I'm looking at the different PSUs and am getting more confused about which one to get. 
New Build:
Asus P5W DH Deluxe WiFi (Socket 775) PCI-Express DDR2 Motherboard (MB-152-AS)
Intel Core 2 DUO E6400 "LGA775 Allendale" 2.13GHz (1066FSB) - Retail (CP-127-IN)
G.Skill 2GB DDR2 HZ PC2-6400 (2x1GB) CAS4 Dual Channel Kit (F2-6400PHU2-2GBHZ) (MY-013-GS)
Arctic Cooling Freezer 7 Pro CPU Cooler (Socket 775) (HS-017-AR)
Connect3D ATI Radeon X1900 XT 256MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-053-CO)
LG GSA-H10NBAL 16x16 DVD±RW Dual Layer ReWriter (Black) - OEM (CD-045-LG)
Seagate Barracuda 7200.10 250GB ST3250620AS SATA-II 16MB Cache - OEM (HD-079-SE)
not sure what I would need
I have been looking at the 460w/500w ones atm, but not sure if that's a bit overkill?
was looking at:
Akasa Ultra Quiet 460W Paxpower Active PFC ATX2.0 PSU - Black Nickel with Blue LED Fan (CA-004-AK)
Akasa AK-P050FG8-BKUK 500W Green Power 80+ (CA-019-AK)
Hiper HPU-4K580-MK Type R 580W Modular ATX2.2 PSU - Black UV (CA-005-HP)
Tagan TG480-U01 480W ATX2.0 SLi Compliant Silent PSU (CA-000-TG)
So many choices

New Build:
Asus P5W DH Deluxe WiFi (Socket 775) PCI-Express DDR2 Motherboard (MB-152-AS)
Intel Core 2 DUO E6400 "LGA775 Allendale" 2.13GHz (1066FSB) - Retail (CP-127-IN)
G.Skill 2GB DDR2 HZ PC2-6400 (2x1GB) CAS4 Dual Channel Kit (F2-6400PHU2-2GBHZ) (MY-013-GS)
Arctic Cooling Freezer 7 Pro CPU Cooler (Socket 775) (HS-017-AR)
Connect3D ATI Radeon X1900 XT 256MB GDDR3 AVIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-053-CO)
LG GSA-H10NBAL 16x16 DVD±RW Dual Layer ReWriter (Black) - OEM (CD-045-LG)
Seagate Barracuda 7200.10 250GB ST3250620AS SATA-II 16MB Cache - OEM (HD-079-SE)
not sure what I would need

was looking at:
Akasa Ultra Quiet 460W Paxpower Active PFC ATX2.0 PSU - Black Nickel with Blue LED Fan (CA-004-AK)
Akasa AK-P050FG8-BKUK 500W Green Power 80+ (CA-019-AK)
Hiper HPU-4K580-MK Type R 580W Modular ATX2.2 PSU - Black UV (CA-005-HP)
Tagan TG480-U01 480W ATX2.0 SLi Compliant Silent PSU (CA-000-TG)
So many choices
