Newbie Advice/Review - Gaming System

Gaming System 2007.5

I am in the process of upgrading my current rig. I have not decided on Memory and PSU and will need some good advice. As you can see I don't upgrade as often as I would like, but will this rig be somewhat future proof in terms of current and upcoming FPS and RTS titles?

Please, I need everyones advice as if this machine will do the gaming job I think it can.

Thanks!!!

New Rig Spec: (tax + shipping)

Case: Lian Li PC-7Bplus (R) $79.99 ($101.78)
Sound: Sound Blaster X-Fi Fatal1ty FPS (R) $159.99 ($171.79)
DVD #1: Plextor PX755SA (R) $89.00 ($96.18)
DVD #2: Samsung SATA SH-S183L/BSBN (R) $79.99 ($84.36)
Keyboard: Microsoft Natural 4000 (R) $24.00 ($24.00)
Speakers: Klipsch 4.1

Need to purchase the following:

PSU: (Any Advice)
Hard Disc: Seagate Barracuda 7200.10 320GB $84.99
Proc: Intel C2D E6600 $313.00
MB: EVGA nForce 680i 122-CK-NF68-A1 $249.99
Memory: (Any Advice)
Video Card: EVGA GeForce 8800GTS 320MB $304.99
OS: Microsoft Windows XP Pro SP2b $139.00
Mouse: (Any Advice)

http://secure.newegg.com/NewVersion/...Number=4594292

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To purchase later

Monitor: Dell 24" LCD $650.00
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Current Rig
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Current System Spec:
Processor: Intel Pentium 3 - 1Ghz
Motherboard: ASUS CUSL2
Memory: 512 PC133 7ns (Mushkin/Crucial)
Hard Drive: 80GB WD Special Editon 8mb Dirve 7200RPM
Hard Drive #2: 120 GB WD Special Edition
Video: NVIDIA GeForce4 MX4000
Sound: SoundBlaster Live Platinum w/Live Drive
PSU: PC Power Cooling Turbo-Cool 300
HSF: Thermaltake Golden Orb
SCSI: Adaptec (AHA) 2940uw
CDrom: Plextor UltraPLEX 32 (scsi)
CDR: Plextor PLEXWriter 4/32(scsi)
DVD: Pioneer 106s (Slot load)
Removable storage: Syquest Syjet 1.5GB
NIC: 3com Etherlink 10/100 (3c905c)
Keyboard: Microsoft Internet Natural
Mouse: Microsoft Intellimouse 3.0 USB
Monitor: Viewsonic P815 21'
Speakers: Klipsch 4.1
Case: Full ATX Tower