Help with First Time Building

I'm thinking about building a computer for the first time, but I'm not sure about the parts I picked out. Any help would be great. I need to make sure that the parts are all compatible. Also, I'm trying to build something that I can get good performance out of, but I can't spend alot. Any ways to cut down on cost or get better parts for the same cost would be great. I'm not worried about overclocking, but it would be nice if I'll be able to upgrade it.

These are the parts:

http://www.compuplus.com/i-Antec-THREEHUNDRED-Gaming-Small-Versatile-ATX-Case-1012389~.html?sid=80kr6jwbvkn35su

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121272&nm_mc=EMC-IGNEFL111408&cm_mmc=EMC-IGNEFL111408-_-DesktopGraphicsVideoCards-_-L0D-_-14121272

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103291&cm_sp=DailyDeal-_-19-103-291-_-Homepage

http://www.buy.com/prod/antec-neo-power-500-atx12v-500w-power-supply-antec-neohe-500-ac-power/q/loc/101/202014022.html?dcaid=15889

http://www.newegg.com/Product/Product.aspx?Item=N82E16822152052

http://www.newegg.com/Product/Product.aspx?Item=N82E16827151171

http://www.newegg.com/Product/Product.aspx?Item=N82E16820227334

http://www.newegg.com/Product/Product.aspx?Item=N82E16832116488

http://www.newegg.com/Product/Product.aspx?Item=N82E16813138117

Or should I just go with this? http://atlanta.craigslist.org/sys/965368629

Well your better of buying things from one place rather from 3. But heres a system for $700 already put together and can play any game. http://www.tigerdirect.com/applications/category/category_slc.asp?MfrId=1583&CatId=6 . But if you want to build your own go for it, Here's a good budget gaming rig: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4140383 -X2 6000 $80 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3574530&CatId=2321 - Mobo $60 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3228139&Sku=C13-6082 -4Gb XMS2 $55 ($25 AR*) http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2337816&Sku=ULT33182 -Case $50 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3276573&Sku=ULT-LSP650 - PSU 650 Watt $50 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4142297&CatId=2458 - Hdd 250 Gb $45 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3424382&CatId=89 - DVD $25 hthttp://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4104586&CatId=3670 - 9800GT with Cod4 $135 ($109 AR*)

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3746817&CatId=3778 - Vista 64 $190

Thanks, the only problem is, since some of these parts have rebates now should I get most of the parts and wait for the cpu, or will the new cpus even affect the prices alot on the current ones?

Edit: This was in response to Marcthpro's post

Thanks, the only problem is, since some of these parts have rebates now should I get most of the parts and wait for the cpu, or will the new cpus even affect the prices alot on the current ones?

Edit: This was in response to Marcthpro's post

There will be other part in rebate that will fit you better in january don't worry about that and I know i'm smart i'm kind to show you all this information soccerguy93 and thx for ur reply ;) and 04carraherh u make no logic not to insult you my new Friend of gamespot but 6000x2 is WAY WEAKER then 9950 Black edition 3.2GHZ OVERCLOCKEd which is already 15-30% BEHIND e8400 overclocked at same SAFE LEVEL So if you want to make sense redefine ur logic and I'm speaking this with all peacefull mind to you 04carraerh but todafy we are the 22th so the 9th january There will be much better cpu for around price and maybe by then ul have a little more $$$ TO increase ur gaming performances by that you can still look if you want to go intel & ATI motherboard Such as E8400 + a P45. or E7300 + A P45
+ A 8800Gt / 4850 or 9800gTX+ which is better then 4850 for 150$? If i'm right

Another question, are ATX and Micro ATX mobos different in anything but size?

Edit: Solved, I looked it up, only other difference is that Micro ATX mobos usually have fewer ports.