I wouldn't get OCZ RAM. It has a tendency to be incompatible with a wide range of motherboards. Also, a better board would the Gigabyte GA-770TA-UD3 (if you don't need onboard graphics) or the Asus M4A88T-M (if you do). It should be about the same cost, but much higher quality.
Depending on what GPU you plan on using, you could easily drop that PSU down. If you're using onboard only with no plans of adding a discrete card, pick up a quality unit under 400W. If you're going to use the HD 5770 or lower, a unit under 450W would be fine. A 5850 or 5870 would need a 450-550W unit. The only cards that'd need 650W or more would be one of nVidia's new cards (GTX 470, 480) or the HD 5970.
Thanks MadAdmiral and batuchka.
About the PSU, this is my first time building a PC, I wanna use average/ budget components first and I am planing on upgrading more later on. (Possibly a hex core AMD cpu). For 50 bucks, i think the antec 650W is a great deal. I would also look into a different memory card. I currently already have the PSU and the case ordered. XD and deciding on the CPU, MEMORY, and mobo.
You can, but you'd be wasting money both when you buy the unit and every time you use it. Using a PSU that's a great deal larger than you need meanst hat it will be operating a very low loads. A PSU is most efficient (i.e. uses the least amount of power and saves on your power bill) when it's at 50% load. At load above or below that, it begins to cost you extra.
Assuming that I would upgrade to a better CPU such as hex core and a better GPU such as 5850. In that case, a 650W PSU is just enought for the system. I want to buy the components that are future proved. So I don't have to worry about replacing them later. That is the reason I picked the PSU and the Momotherboard.
The hex core doesn't really mean much to the power usage. And 650W is enough for two 5850s. I'd at least consider decrease it to a 550W unit.
The MIS board is lower quality. Generally, Asus and Gigabyte are considered the hgihest quality, followed by MSI and EVGA. Just because it supports things doesn't mean its a good board. And to be technical, all AM3 boards will support DDR3 and hex core CPUs, so that's not uncommon. The 8xx chipsets only really give you the ability to drop in a X6 CPU (which you won't need unless you're doing heavy CPU work like encoding or rendering) without first updating the BIOS (which is free and may even come with the board). You're not getting much for the extra money.
The only potential issue with the Gigabyte is that it doesn't have onboard graphics, which it appears you're planning on using. The Asus I linked to would, and is essentially a higher quality version of the MSI.
I currently have a old gt 9800 GPU which I am planing to upgrade later. Also, how is AMD Phenom II X4 955 compred to the Athlon x3 I mentioned above? I might need to do some CAD later on for my engineering jobs.
msi used to be bad but now they are catching up. Their highest end boards usually have higher quality parts than the gigabyte counterpart in the same price range. Msi's low end boards are really low end and the gigabyte/asus dominates the msi in the low budget boards