honestly, the best thing for you to do would be to try out installing windows vista onto your system for a few days and seeing how it works for you. wait for RC1 as it is coming out soon, and it will give you a general idea of how windows vista will perform on your computer. i personally found that installing windows vista wasn't a big deal, until i went back to xp, which made a bigger impact on me. it's kind of like when xp came out and everyone was using 98; a lot of people were, ooo, a nice looking version of 98 that takes up more resources. but try using windows 98 after you've used xp for a long time, and you'll feel all dirty. (at least i do). vista won't improve the performance on the same hardware, and will probably decrease your productivity while you are learning it, but if you manage to adapt, it may increase ur productivity in the long run. for example, i've been finding the breadcrumb bar of windows explorer to be absolutely indispensible in vista, and curse that xp doesn't have that option, the same goes for the search on the start menu.