I can only tell you what I prefer. I program for a living, and I've found that SXGA+ works great at either 14" or 15" screen size. I have a UXGA screen on one laptop, a Dell Inspiron 8200, and while it is beautiful for looking at pictures, it winds up making it slightly harder to work. You can always monkey about with your font sizes, but some programs either look and work weird with large font sizes, or don't respect different font sizes at all, so you wind up with tiny little text. (I don't know what you do for work/fun, but one example is SQL Server Query Analyzer: you can set the font for viewing/working with text, but the left-hand nav is almost unusable on a 15" UXGA screen.)