Thanks for all your input. I was wondering if with what I have now, the 450watt will be enough or should I go with something bigger? Like is it extremely crucial or can it wait (because I already ordered it as is)

So I just bought this computer from ibuypower.com and was wondering what you guys thought of it. Any problems I overlooked or anything?

Case ( [New !!!] Nzxt Hush Gaming Tower Case w/420W Power Supply Black )
Case Lighting ( None )
Power Supply ( Standard Case Power Supply )
Processor ( Intel Core 2 Duo Processor E6420 (2x 2.13GHz/2MB L2 Cache/1066FSB) )
Processor Cooling ( [New !!!] iBUYPOWER Liquid CPU Cooling Fan System Kit --- [for INTEL CPU] )
Motherboard ( Asus P5N-E SLI nForce® 650i SLI Chipset w/6-channel CODEC, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 Dual PCI-E MB )
Memory ( 2048MB [1024MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand )
Video Card ( NVIDIA GeForce 8600GTS 256MB w/DVI + TV Out Video )
Video Card Brand ( Major Brand Powered by NVIDIA )
Hard Drive ( 250 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 8M Cache] )
2nd Hard Drive ( None )
External Raid Hard Drives [USB 2.0/eSATA] ( None )
CD/DVD Drive ( 16x DVD-ROM Drive Black )
CD-RW/DVD-RW Drive ( 52x32x52 CD-RW Drive Black )
Sound Card ( 3D Premium Surround Sound Onboard )
Speaker System ( None )
Network Card ( Intel Pro 10/100/1000 Network Card )
Floppy Drive ( None )
Monitor ( LCD Monitor ViewSonic 19" VA903B TFT LCD Monitor [Black]
2nd Monitor ( None )
Keyboard ( Logitech Deluxe Keyboard Black )
Mouse ( None )
Meter Display ( None )
Flash Media Reader/Writer ( 12-In-1 Internal Flash Media Card Reader/Writer Black )
Operation System ( Microsoft Windows Vista Home Premium + [Free 60-Day !!!] Microsoft Office 2007(Word, Excel, Outlook, PowerPoint, Access ....) )
Media Center Remote Control & TV Tuner ( None )
Case Round Cable ( Professional wiring for all cables inside the system tower )
IEEE-1394 Fire Wire Card ( None )
USB Flash Drive ( None )
TV Tuner ( None )
Video Camera ( None )
Headset ( None )
Power Protection ( None )
Printer ( None )
Printer Cable ( None )
Wireless Network Adapter ( [Special !!!] Wireless 802.11g 54Mbps PCI Adapter )

So I just bought this computer from ibuypower.com and was wondering what you guys thought of it. Any problems I overlooked or anything?

Case ( [New !!!] Nzxt Hush Gaming Tower Case w/420W Power Supply Black )
Case Lighting ( None )
Power Supply ( Standard Case Power Supply )
Processor ( Intel Core 2 Duo Processor E6420 (2x 2.13GHz/2MB L2 Cache/1066FSB) )
Processor Cooling ( [New !!!] iBUYPOWER Liquid CPU Cooling Fan System Kit --- [for INTEL CPU] )
Motherboard ( Asus P5N-E SLI nForce® 650i SLI Chipset w/6-channel CODEC, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 Dual PCI-E MB )
Memory ( 2048MB [1024MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand )
Video Card ( NVIDIA GeForce 8600GTS 256MB w/DVI + TV Out Video )
Video Card Brand ( Major Brand Powered by NVIDIA )
Hard Drive ( 250 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 8M Cache] )
2nd Hard Drive ( None )
External Raid Hard Drives [USB 2.0/eSATA] ( None )
CD/DVD Drive ( 16x DVD-ROM Drive Black )
CD-RW/DVD-RW Drive ( 52x32x52 CD-RW Drive Black )
Sound Card ( 3D Premium Surround Sound Onboard )
Speaker System ( None )
Network Card ( Intel Pro 10/100/1000 Network Card )
Floppy Drive ( None )
Monitor ( LCD Monitor ViewSonic 19" VA903B TFT LCD Monitor [Black]
2nd Monitor ( None )
Keyboard ( Logitech Deluxe Keyboard Black )
Mouse ( None )
Meter Display ( None )
Flash Media Reader/Writer ( 12-In-1 Internal Flash Media Card Reader/Writer Black )
Operation System ( Microsoft Windows Vista Home Premium + [Free 60-Day !!!] Microsoft Office 2007(Word, Excel, Outlook, PowerPoint, Access ....) )
Media Center Remote Control & TV Tuner ( None )
Case Round Cable ( Professional wiring for all cables inside the system tower )
IEEE-1394 Fire Wire Card ( None )
USB Flash Drive ( None )
TV Tuner ( None )
Video Camera ( None )
Headset ( None )
Power Protection ( None )
Printer ( None )
Printer Cable ( None )
Wireless Network Adapter ( [Special !!!] Wireless 802.11g 54Mbps PCI Adapter )