Uploading some walls. There are 4 wall sizes in each zip. 800x600, 1024x768, 1280x1024, 1600x1200.
Should I go with JPEGS or BMPs?
Bitmaps show up nicer on most desktops but Jpegs have a smaller file size. I can't decide.
ETA: Also, are there any other really popular sizes I should include?