Well... if you want a gaming machine then I would not sugest an INTEL unless you get the latest ones. The Core 2 Duo. but I still cannot see your links... but since your using a ".com" adde I'm assuming you can look at places like Newegg, Mwave, Pricewatch. Take a look at the system parts there and see what you like. If I may... I would start with looking at something along the lines of:
possible DFI mob with some kind of AMD dual core CPU
a good 450-550W PSU from ANTEC, Enermax, etc..
2GB DDR/DDR2 RAM - Corsair, Kingston, PQI, etc...
a decent after market CPU fan - Zalman, Arctic Cooling
a 7900GT PCIE video card (good choice)
a decent sized SATA II hard drive (also, a good choice)
then all the exras - DVD burner, floppy, KB/mouse, etc...
OR the Conroe setup... with all the odds and ends... you can find those by doing a search for conroe and reading thru the forum.