First Build, Gaming Computer 1k-1.5k Help

I need a new computer for Warhammer Online, originally I was just going to buy one but I looked into buying parts and building a computer myself and it seems cheaper with better parts.

I picked out some parts off of newegg.com that I think work together, though I'm not 100% sure they all work together.

I want to be able to upgrade my computer in the future. I'd like to be able to add more memory, or a new video card to keep my computer up to date. Is this mother board good for future upgrades? These items come in at a total of close to $1,000 though I am willing to spend somewhere around $1,500 if it will benefit me in the long run.

Any help on these parts would be appreciated, I'd really like to know if any of the parts aren't quite adequate. Thanks.

Motherboard: ASUS P5Q Deluxe LGA 775 Intel P45 http://www.newegg.com/Product/Prod [...] 6813131297
Video Card: EVGA 512-P3-N871-AR GeForce 9800 GTX(G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported http://www.newegg.com/Product/Prod [...] 6814130339
CPU: Intel Core 2 Duo E8500 Wolfdale 3.16GHz 6MB L2 Cache LGA 775 65W Dual-Core Processor http://www.newegg.com/Product/Prod [...] 6819115036
Memory: OCZ Reaper HPC 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit http://www.newegg.com/Product/Prod [...] 6820227289
HDD: Western Digital Caviar SE16 WD6400AAKS 640GB 7200 RPM 16MB Cache SATA 3.0Gb/s http://www.newegg.com/Product/Prod [...] 6822136218
DVD Drive: Sony NEC Optiarc Black 16X DVD-ROM 48X CD-ROM IDE DVD-ROM Drive Model DDU1615/B2s http://www.newegg.com/Product/Prod [...] 6827101131
Power Supply: OCZ GameXStream OCZ600GXSSLI 600W ATX12V SLI Certified CrossFire Ready Active PFC Power Supply http://www.newegg.com/Product/Prod [...] 6817341001
Case: ENERMAX Uber Chakra ECA5001B Black Aluminum / Steel ATX Full Tower Computer Case http://www.newegg.com/Product/Prod [...] 6811124121

Change the DVD burner to SATA. The HD4850 is a bit better card then the 9800GTX, is a bit cheaper and you can crossfire the ATI card on that motherboard if you choose to do so later.
http://www.newegg.com/Product/Prod [...] 6814102770
this is really a better choice for RAM, and cheaper also
http://www.newegg.com/Product/Prod [...] 6820146731
A very solid build though

+1 on the Mushkin RAM. It runs at its advertised timings at the JEDEC standard 1.8v.
I haven't decided if I will try Warhammer Online because I don't know what their subscription fee will be. If it is more than for a good monthly magazine (e.g. $6-$7), I will probably pass on it, otherwise I would think that my 3850 should be fine for it. I'd love to have a reason to buy a 4850, but this title isn't it. I would still agree with dirtmountain that the 4850 is the card to get though, for the performance/price and a little more future-resistance.