Re: New Computer Help Please.
Please please don't get the Antec 1200. If you really want a case of the same type then go for the NZXT Tempest. But I would recommend a Gigabyte 3D Aurora or a Thermaltake Armor/Shark.
The amount of RAM really depends on whether you'll be running Vista or XP. XP will run fine with 2GB but I had a nice performance boost when going from 2GB to 4GB. You don't need anything more than some good 800MHz RAM for an Intel setup.
If you're not doing SLI then do not go with an Nvidia mobo, they do not handle high FSB speeds as well as a P35 or X38. Plus I'd say CrossfireX is the superiour technology anyway (P45 will have CrossfireX support). Not to mention the 780i's are way too expensive.
As for the PSU, I'd say go for the cheaper StealthXStream (they are exactly the same except don't have an LED fan). 600W is more than sufficient.
GPU, I'd say wait for the HD 4870. Launch date is 15th June and performance is comparable to the GX2 whilst the die size is less than 300mm2 and the TDP only 150W.
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.