New Hardware: Whatcha think/ advice

Ok, here's my current setup:
Motherboard: Intel D850GB
BIOS: GB85010A.15A.0028.P09.0103091412 (up to date)
CPU: Pentium 4 @ 1300 MHz
Multiplier: 13.0
Bus Speed: 100.0 MHz
FSB: 400 MHZ
RAM: 640 MB (2x64 MB RDRAM PC800 (400 MHz), 2x256 MB RDRAM PC600 (300 MHz))
GPU: PNY nVidia 6200 Verto 8x (415/775)
OS: Windows XP Pro SP2

My father is getting me new components, as a birthday/ Christmas present. I am including links to all components:
Motherboard: ASUS P4S800D-X ATX
Processor: Intel Celeron D 325 2.53GHz Socket 478
Memory: Kingston HyperX 1GB (2 x 512MB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Dual Channel Kit
Heatsink/ Fan: Thermaltake P4 Spark 5 70mm Ball
Case: Rosewill R5717 BK 120mm Fan ATX Mid Tower Computer Case+450W Power Supply
Also, I am getting the Artic Silver 5 Thermal Compound.
Current Price: $322.53 w/ tax and shipping

SO, I guess my question is, is this a decent budget setup? I already have the HDD, GPU, and case fans from my current tower to throw in there as well. have read good reviews on the products above, but am just wanting to get the advice of the knowledgeable members here.

Is there anything that could be changed to increase performance, that also would not take the price up more than say $25?

Any advice or comments are welcome.

 

well....the only thing i could see upgrading for cheap is the processor but that would nearly double the price of the CPU. However, a 3.0ghz p4 will outperform a celeron d 2.5 by quite a bit thanks to its higher clock speed, extra caches, and hyperthreading. Id dish out the extra $40 and grab a p4 if i were you, you wont be disappointed if you do.

http://www.newegg.com/Product/Product.asp?Item=N82E16819116027