Yeah i know the albums list is on their website but the actual physical 25th anniversary May issue of that - with 'the 100 moments that rocked our world' on the cover, that never out in UK so 2 months without new Spin.
They make it pretty clear that Stankonia is their favorite OutKast album; they actually say exactly that. Yeah I made a mistake with Chutes Too Narrow, I still don't see The Blueprint in their T20, while I guess Marshall Mathers LP could fit the bill. From what I can tell the highest they've ever ranked a rap album was The Low End Theory at 3rd for 1991.