Memory Choices--AGAIN

I just can't decide on which dual channel memory I want to get. I have a few I've narrowed it down to, but there are so many differences(timings, spree, price)here's what I got:
http://www.buyaib.com/avi512pc53du.html

http://www.cluboverclocker.com/reviews/memory/kth/kth4200/2.htm

http://www.newegg.com/app/ViewProductDesc.asp?description=20-146-293&depa=0

http://www.newegg.com/app/ViewProductDesc.asp?description=20-209-036&depa=0
I like the Muskin 'cause of timings, but its pc3500 and the most expensive-$158; the A-DATA is pc4200-$130 but the timings aren't as tight, same with the Komusa stuff$132(site down at the moment-I hope) and the PMI stuff is the cheapest$110, also have pc3500($100) but Newegg is out right now; Can't decide-have other things I need to purchase for computer also..

Whatever you do, don't buy from www.buyaib.com . This store has one of the worst reputations on this forum, and is notorious for purposefully selling memory that does not meet spec.

http://www.resellerratings.com/seller2870.html

well, that's one off the list...Actually been looking at the PMI stuff, read a few reviews and it doen't seem bad at all. Can't find the pc3500 duall channel on Newegg anymore though..Was $100!!!

Here's a good price on 1gb pc3200 memory
http://www.komusa.com/1gbkit5pc40d4.html