New build.

Two months ago I made the last computer upgrade but I plan soon to upgrade it again.

Currently I have:
- CPU: Intel Pentium D945 3.4 GHz
- MB: ASUS P5LD2-SE
- RAM: PQI 1GB DDR2 667
- GFX: ASUS GeForce 6600 256MB 128bit
- CPU Cooler: ASUS V-Nardo
- Sound: Razer Barracuda AC-1 Sound Card
- HDD: ExcelStor J880S 80GB 7200
- PSU: Delux 450W

And I am plan of getting these:
- CPU: Intel Core2Duo E6320 or E6420
- MB: ASUS P5B or P5B-E or P5B-E Plus
- RAM:
1Gb GeIL DDR2 PC2-6400 Ultra CL4 Dual Kit
1Gb G.Skill DDR2 PC2-6400 PK Series Dual Kit
1Gb OCZ DDR2 PC2-6400 800MHz Gold GX XTC Dual Kit
1Gb G.Skill DDR2 PC2-6400 NR Series Dual Kit
Which ram?!?!?!

- GFX: Sapphire Ati X1650 or X1950 or Inno3D GeForce 7600GT with Zalman VF-900 or ASUS 7900 GS
- CPU Cooler: Coolermaster Hyper 6+
- Sound: I will keep my sound card.
- HDD: I will get one more WD 250GB SATA2.
- PSU: Spire 600W RockeTeer VI

Just tell me what should I change and why. What do you recommend. I am not an expert so I expect opinion from you.

If you have the P5LD2 SE revision 2.0, you could skimp back on a few things. The revision 2.0 allows ddr2 800, which I have been kicking myself over since I bought 667 ram. If you do have the revision 2.0, you could forget a new mobo, and get an 8800gts, which would be much better future proofing. Get a bigger PSU though, just to make sure.

I vote for the 1950 graphics, go with some budget ddr2 800 ram, and an e-4 series with the lower FSB. That way you can run 1:1 and pull more clocks out of it.

I would advise going for a budget 2gb set of ddr2. Gskill, Crucial, Corsair are all good choices in their budget lineup. Trust me going to 2gb while the prices are low will save you money.

And about the fsb, to oc that cpu you will need some niice ram. If you go with an E-4 series, you get the 800fsb and can run 1:1 up to 400 reliably which on an e4300 would be 3.2ghz if it reached there.

Get the G.Skill PKs, or consider the HKs or HZs. The HZs are supposed to be lower binned D9 while the other two are high binned promos. I think you should get some decent mhz out of any of them.

Is 1950 better than 7900GS, do you have some tests?
Anyway I decided which ram.
I'll go with 2 gigas, dual kit and PC6400. G.Skill's HK or HZ or OCZ's Gold GX XTC and Platinum Revision 2. What do you think?