I was under the impression that it was 160GB (that is, two 80GB drives) that ``pushed the envelope''. So one 80GB drive is probably fine. Is that correct? (Edit: It's not. See posts below.)

I also like New Egg for online purchasing. They have good prices and good shipping costs (amongst the best I've seen regularly) and their web site is not too attractive, but has the best features of any online retailer I've ever seen by far.