Before I begin I'd like to say I already have a Lite On IDE DVD Burner, ATI Radeon HD 4650 1GB, and a 430W Thermaltake PSU so i'll just use those on my new system, after all i'm not gonna use it for crysis or anything like that and I can always upgrade the video card when I want to:
(all from newegg)(I'm kinda on a budget)
1) Case: NZXT GAMMA - $35
2) Motherboard: Asus M4N75TD -$100
3) CPU: AMD Phenom II X6 1055T -$205
4) Memory: 2x Kingston 2GB 240-Pin DDR3 - $110
5) CD Burner: Lite On DVD Burner (IDE) and - $22
6) Media Reader: nMEDIAPC ZE-C68 All-in-one - $10
7) Hard Drive: Seagate Barracuda 500GB - $55
8) OS: Windows 7 Home Premium 64 bit - $100
Oh btw stupid questions since this is my first homebuilt;
1) does windows 7 come with an internet browser or do I have to get on some other way.
2) When I put all the parts on the motherboard don't I have to install drivers for all of them to use them, but I need to install the OS to install the Drivers, and I can't install the OS if I can't use my computer's parts; please elaborate on this.
1) Windows 7 will have Internet Explorer so no need to find it some other way.
2) Drivers do not require installing until the computer has the OS. Assuming the CPU and Motherboard and RAM are compatible then once everything is connected the computer will turn on, boot from the DVD drive and install the operating system. Once the Windows is up and running, you can then you the CDs that came with your motherboard etc. to install drivers.
The items you already have I assume are from your old system? Did your old system run Windows XP? I assume it is no longer used? If this is the case then you can legally buy the Windows 7 Upgrade version and install onto a clean hard drive (instead of the more expensive full version). To see more details on how to activate a Windows 7 upgrade once installed on a blank HDD just have a look on the internet, it shows you how. It is only not legit if you still use the old machine and windows XP...or if the XP was OEM.
When you can afford it I would obviously upgrade the graphic card to a 5850 ideally or even just a 5770. Also get a new PSU around the same time
I would recommend that you fill out the Build Advice form in my signature, as I would most likely change a number of the components depending on your uses, etc. Asteldian had some good recommendations too.