My current wallpaper is
this (3360x1180) ef ~a tale of memories~ image.
I've considered using
this (3000x1049) To Heart 2 image, but prefer darker wallpapers.
Both compressed slightly because of photobucket's 1MB limit, but it didn't appear to lose anything. I'm too lazy right now to get my other potential walls under 1MB and post them.
I also have Winamp on the extreme right side, so it's perfect because it covers nothing but the logo. I can ignore the stickposter/aquaplus/axia text in the bottom left because the windows startbar covers it. One concern with a spanned dual monitor wallpaper is what gets cut off in the middle. Thankfully, on the ef wall, the break only splits down Kei's right arm (your left) and doesn't look bad. The TH2 wall is also perfect in terms of balance for the split.