I'm considering the t4220 and have been checking out the ordering and price options. Based on pricing, availablity, etc., I have a few configuration questions. You can probably tell that I'm not particularly computer saavy. 1) Is t7300 and 4mb cache much better than t7100 and 2mb cache? I don't use heavy applications. Mostly web browsing, powerpoint, and word, though I often have multiple windows open. 2) What if you had to decide between a) t7300 and 4mb cache with 1gb or b) t7100 with 2mb cache and 2gb memory? 3) Is 2gb memory pretty much necessary for the machine to perform well with Vista? or can 1gb suffice for my kind of useage?