Which of these rams should I pick.

Kingston 1GB Kit HyperX DDR 400MHz 2-3-2-6 ($225 CAD)

or

Corsair TWINXP1024-3200C2 XMS3200 1024MB 2.5-3-3-6 ($180 CAD)

or

simply Corsair Value Select ($125 CAD)

Current rig:
A64 3200+
Antec Truepower 430W
K8N Neo Platinum (Socket 754)
ATI X800XL 256MB
Seagate 160gb 8mb
Audigy 2 ZS

currently running on PC2700...

I plan to use them for gaming... Dont plan on overclocking.

 

Of the three ya posted, I'd go for the Kingston, is CL2, Tighter timmings.
Or
Here's better deal, better memmory, some good stuff, thats made from Samsung TCCD chips:
http://www.newegg.com/Product/Product.asp?Item=N82E16820220033
If you ever decided to OC these chips OC very well too.
Here the manufacture page:
http://www.patriotmem.com/products/groupdetailp.jsp?prodgroupid=17&prodline=2&group=XBL&catid=1

 

I'd go with the Corsair Value Series and use the extra money to buy more of it. Timings and such with the XMS and HyperX don't really mean anything to you if you don't plan on overclocking. I would invest some money in copper heatspreaders though. There is myth and rumor about whether or not they really work, but it makes me feel better and they are pretty cheap. Copper is a better heatspreading metal than aluminum! Check newegg.com