You should be able to find a LOT of shows you might want to watch simply by browsing thru
bakabt.com since there are screencaps, descriptions, and user commentaries for each show. You might also want those artbooks associated with TTGL such as Gurren Groundwork.
http://www.bakabt.com/148313-groundwork-of-gurren-lagann-1.html Image is the smallest filesize wallpaper I have for Gurren-Lagann. Despite being for 1920 x 1080, it looks great since display changes resulting from the small filesize make it look even better.
