P4 replacement budget build

APPROXIMATE PURCHASE DATE: Hopefully in the next few days.
BUDGET RANGE: 350$ US Before / After I would prefer not to have to deal with too many rebates. Free shipping is a plus.
SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Only gaming.
PARTS NOT REQUIRED: Power supply is a Antec Earthwatts 430W. An older Antec case loaded with fans. Windows XP 32 bit OS. Monitor, keyboard and mouse is not required.
PREFERRED WEBSITE(S) FOR PARTS: newegg.com
PARTS PREFERENCES: No preference.
OVERCLOCKING: Eventually
SLI OR CROSSFIRE: Unlikely
MONITOR RESOLUTION: If possible I would like to use dual monitors. I have 2 Samsung 19inch monitors 1280 x 1024 and 2 Samsung 23inch 1920 x 1080 monitors.
ADDITIONAL COMMENTS: I am a multi box gamer and this is not my primary system. I am trying to phase out a 7 year old AMD build and a 6 year old P4 build. I don’t want to waste any more money trying to upgrade them.

I really need to start cheap and build up. For now I would like to reuse the components mentioned above (PSU, Case, OS & Monitors). Eventually I will upgrade to a 64 bit OS, 4 to 8GB of ram and a 5XXX series video card.

PARTS REQUIRED:
Motherboard with at least 1 PCI Express 2.0 X16 slot and DDR3 memory support, RAM 4 slots would be a plus.
CPU with 3 or more cores. I will be running multiple applications/games at once.
RAM only 2gb since I am using 32bit XP, hopefully something worth upgrading to 4gb.
Video Card nothing to expensive. This will be the first thing replaced.
HDD & DVD need to have SATA connections. I do want to reuse IDE devices.

75$ AMD Athlon II X3 435 Rana 2.9GHz
60$ ASRock AM3 Motherboard
100$ 4850 GDDR3 512MB 256-bit
55$ Crucial 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600)
55$ SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM
20$ LITE-ON Black 24X DVD
365$ total

I have a few questions regarding this replacement build.
Are all of these components Windows XP 32 bit compatible? Do any require a 64 bit OS?
Are the components balanced?
Is the ASRock MB the right choice?
Is the DDR3 4850 a good card or do I need a DDR5 card?
Should I spend another 20$ for Cas7 DDR3 RAM?
Is the hard drive a good choice at in that price range? - Updated!

Your comments are appreciated.


70$
AMD Athlon II X3 425 Rana 2.7GHz 3 x 512KB L2 Cache Socket AM3 95W Triple-Core Processor - Retail
http://www.newegg.com/Product/Prod [...] 6819103726

60$
ASRock M3A770DE AM3 AMD 770 ATX AMD Motherboard - Retail
AMD 770, AOD ACC support, 4x DDR3 1600, EuP Ready
http://www.newegg.com/Product/Prod [...] 6813157176

100$
GIGABYTE GV-R485ZL-512H Radeon HD 4850 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
http://www.newegg.com/Product/Prod [...] 6814125238

55$ - Cheapest Cas9 latency 2GB DDR3 set
Crucial 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Dual Channel Kit Desktop Memory Model CT2KIT12864BA1339
http://www.newegg.com/Product/Prod [...] 6820148194

75$ - Cas7 latency
G.SKILL Ripjaws Series 2GB (2 x 1GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-2GBRH
http://www.newegg.com/Product/Prod [...] 6820231343

20$ Cheapest DVD drive.
LITE-ON Black 24X DVD
http://www.newegg.com/Product/Prod [...] 6827106289

55$
Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive
http://www.newegg.com/Product/Prod [...] 6822148395

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Updates

55$
SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Prod [...] 6822152181

75$
AMD Athlon II X3 435 Rana 2.9GHz 3 x 512KB L2 Cache Socket AM3 95W Triple-Core Processor - Retail
http://www.newegg.com/Product/Prod [...] 6819103724

I'm not sure of the specs of your old builds, but I'd really just save up until you have about $700, then build a nice new system.

In the long run, you're wasting more money by doing small incremental upgrades.

Also, if you wanna game on multiple 1920 x1080 monitors, you're gonna need a nice GPU.

For the same price as the Seagate drive, I'd get the Samsung F3.

SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive $54.99

I would spend an extra $4 and get a faster CPU.

AMD Athlon II X3 435 Rana 2.9GHz 3 x 512KB L2 Cache Socket AM3 95W Triple-Core Processor - Retail $74.99

Oh didn't include and optical, but honestly you can use your laptop to burn stuff and recycle an old cd drive. Or just spend an extra $21, but I'd rather put that towards the HSF first.

Well laptops generally are much more money for equivalent parts and laptop GPU's =/= desktop GPUs.

In gaming, you'd be lucky if xfire laptop 5870's got anything near the performance of a single 5770.

Requires certain Phenom/Athlon II x3 or x2 combined with certain motherboards.
But yes, that MOBO will work.

http://www.overclock.net/amd-cpus/ [...] guide.html