Looking for a Power Supply for a Dimension 4500.....

Hello,

I need to find a decent power supply with more juice than my stock 250Watt
unit. I've considered upgrading my video card to maybe an ATI 9800Pro All in
Wonder.

I was wondering if anyone knew anything about this brand/model or could
recomend one. I'd like to keep it under $100.

"Antec SmartPower 2.0 SP-450 450W P"

My System Specs:

Dell Dimension 4500
2.8Ghz Pentium IV
1 Gig of ram
36 Gig Western Digital drive
250 Gig Maxtor drive
250 Gig Seagate drive
Creative Labs Sound Blaster Audigy 2
ATI Radeon 9600XT 256 mb
52X Lite-On CD-RW/DVD drive
8x Sony DVD+/-RW drive.
Pinnacal PC/TV capture card
NEC 1810 18" flat panel
WindowsXP Home Edition