Need help choosing

Im looking at 3 systems right now, and I dont know which is the best bet

http://www.newegg.com/Product/Prod [...] 6834220208

http://www.newegg.com/Product/Prod [...] 6834220182

I like the price of the first one, but I dont know how the turion compares to the intel, and I know the 8600 is better than the 2600, because they're both ddr3, will the performance difference be worth the extra $

the other system I was looking at is:
http://www.cyberpowerpc.com/system [...] urator_top
with the system modified with a 2.4 core 2, and a 250 gig HD, bringing the total to around 1206, which is cheaper than all the others, but this one is from a less main stream brand, and the video card is only ddr2.

Which would you go for? Also if anyone has any other suggestions about systems, the budget is not much higher than 1600 including tax, and I would PREFER a ddr3 video card, and even an 8700GT if possible (i havent really been able to find any systems with the 8700GT, aside from a toshiba with a weak 1.8 ghz cpu)

I just noticed that this dell XPS m1530

http://configure.us.dell.com/dells [...] WHN3&s=dhs

seems to be on sale by almost $700. but I dont know if dell uses the DDR3 version of the 8600GT, how does that one look?

It came out to like 1500 something, including tax, the only change I made to their preset system was upped the screen from the 1280 to the 1440