Vote for your winners, results will be posted tomorrow:
#1 Led Zeppelin vs. #16 Dusty Springfield
#8 Frank Zappa vs. #9 Roy Orbison
#5 Joni Mitchell vs. #12 The Impressions
#4 Otis Redding vs. #13 Tim Buckley
#3 Simon & Garfunkel vs. #14 Three Dog Night
#6 Cream vs. #11 Sam And Dave
#7 Grateful Dead vs. #10 Hank Williams
#2 Bob Marley vs. #15 Steve Miller Band

#1 Led Zeppelin
#9 Roy Orbison (tough - I'd prefer to listen to Orbison normally,but Zappa is a genius with one of rock music's most illustrious back catalogues. I feel like Zappa should get the vote,and yet I'm voting for Orbison)
#5 Joni Mitchell
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#10 Hank Williams
#2 Bob Marley

#1 Led Zeppelin
#9 Roy Orbison
#12 The Impressions - A blow out for me. The Impressions are severely underrated.
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#7 Grateful Dead - I hold the likely unpopular opinion that the Dead were, collectively, better songwriters than Williams.
#2 Bob Marley

Led Zeppelin
Frank Zappa
pass
Tim Buckley (tough draw)
Simon & Garfunkel
Cream
pass
Steve Miller Band

#1 Led Zeppelin (not that obvious though)
#8 Frank Zappa (and this was really hard)
#5 Joni Mitchell
#13 Tim Buckley (A year ago I would easily vote for Tim. I think I am about to change my mind but it's more fun this way.)
#3 Simon & Garfunkel
#11 Sam And Dave
#10 Hank Williams (Guys, this is an important vote!!!!!!!!!!!!)
#2 Bob Marley

#1 Led Zeppelin
#8 Frank Zappa
Orbison: Great singer, I dislike his songwriting.
#5 Joni Mitchell
#13 Tim Buckley
pass (Never heard of Three Dog Night)
#11 Sam And Dave
#10 Hank Williams
(My dad's obsession with Grateful Dead ruined them for me.)
#2 Bob Marley

Some tough choices today!

#1 Led Zeppelin (Dusty is a very strong #16 seed. I understand why Led Zep is great, but I’m never going to dig them. I think they deserve another round or two, but I’m putting on the brakes once they’re up against Otis.)

#9 Roy Orbison (Frank was sort of an avant-garde entrepreneur whom I respect more than enjoy. Roy only had four or five great songs, but he had one of the most iconic voices ever. And I like his goofiness more than Frank's goofiness. And he was a fellow Texan.)

#5 Joni Mitchell (Another tough choice, but less so than the above two.)

#4 Otis Redding (Wow…fourth matchup in a row between two very worthy opponents. Have to go with Otis. He WAS soul music.)

#3 Simon & Garfunkel (@BillAdama: O lucky man, to have never heard of Three Dog Night.)

#11 Sam and Dave (Love these guys. I have to admit that Cream was massively influential—probably more so than is generally appreciated. It’s just that I find that influence mostly malefic.)

#10 Hank Williams (Easiest upset pick of the UMT thus far.)

#2 Bob Marley (Don’t feel strongly about either Marley or Miller. If I was using Slick’s logic from yesterday, I’d have to pick Steve Miller, since the chicks dig his stuff. But apparently, that kind of logic leads to Howlin’ Wolf losing to effing Chicago, so I think I’ll pass.)

#1 Led Zeppelin
#8 Frank Zappa
#12 The Impressions
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#7 Grateful Dead
#2 Bob Marley

#1 Led Zeppelin
#9 Roy Orbison
#5 Joni Mitchell
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#7 Grateful Dead
#2 Bob Marley

Led Zeppelin
Frank Zappa
Joni Mitchell
Otis Redding
Simon and Garfunkel
Cream
Grateful Dead
Bob Marley

#1 Led Zeppelin
#9 Roy Orbison
#5 Joni Mitchell
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#7 Grateful Dead
#2 Bob Marley

Give me chalk (all the higher seeds).

#1 Led Zeppelin
#9 Roy Orbison
#5 Joni Mitchell
pass
#3 Simon & Garfunkel
#6 Cream
#10 Hank Williams
#2 Bob Marley

#1 The Mighty Zepp
#9 Roy Orbison - I HATE ZAPPA!!!
#12 The Impressions - Very, Very underrated band
#4 Otis was the man and will always be the man
#14 3DN - This is mor of an anti-S&G vote than anything else.
#6 Cream - Really close matchup, but if I listed the top 10 songs from these 2 artists, Cream would have 7.
#10 Hank - all day, he was great and I hate the dead and would only vote for them over Zappa.
#2 Marley - Rounds out a loaded bracket.

#16 Dusty Springfield
#8 Frank Zappa
#5 Joni Mitchell
#4 Otis Redding
#3 Simon & Garfunkel
#11 Sam And Dave
#10 Hank Williams
#15 Steve Miller Band

Zeppelin
Orbison
pass (to close, and I don't know enough by either to make a solid choice)
Otis (If it were Jeff, It'd be different)
S&G (Three Dog Night's pretty good though)
Cream (ditto my above comment)
Pass
Marley

#1 Led Zeppelin
#9 Roy Orbison
#12 The Impressions
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
#7 Grateful Dead
#2 Bob Marley

RESULTS:
Led Zeppelin 96.6% / Dusty Springfield 3.4%
Roy Orbison 60% / Frank Zappa 40%
Joni Mitchell 67.9% / The Impressions 32.1%
Otis Redding 89.7% / Tim Buckley 10.3%
Simon & Garfunkel 82.8% / Three Dog Night 17.2%
Cream 73.3% / Sam & Dave 36.4%
Hank Williams 53.6% / Grateful Dead 46.4%
Bob Marley 80% / Steve Miller Band 20%

Too late but here is my choice.

Tie
#8 Frank Zappa
#12 The Impressions
#4 Otis Redding
#3 Simon & Garfunkel
#6 Cream
Beurk
#2 Bob Marley