Vista - No using any 64 bit apps, so, why keep x64?

Is there any real benefit to keeping x64 Vista on my desktop machine if I run absolutely no applications that take advantage of it?

Here's my setup:

Athlon 64x2 3800+ (socket 939)
MSI K8N SLI MB
160gb SATA1 HDD
500gb USB external WD drive
2GB Corsair ram in dual channel mode
2x BFG Geforce 7600GT boards in SLI mode
Belkin wireless card
2x DL Lite-On DVD-RW drives

What do I use the machine for?
1) Web Surfing
2) 3D FPS gaming (Rare these days) - nothing ultra modern - Battlefield 2, Battlefield 1942, Novalogic's Joint Operations series, the occasional game of Rainbow Six 3
3) Windows Media Encoder running at all times (except when gaming), streaming the audio from my police scanner.
4) ProScan (Another method of streaming my police scanner - if WME is running, it's running).
5) Finances
6) Digital photos
7) Hurricane tracking (I live in Florida right where all the flooding took place this year from Tropical Storm Fay)
8) UseNet
9) The occasional DVD Rip
10) The occasional CD rip

So, if I go down to the x32 version from x64, would I see any performance losses?

Hello JWhipple,

The articles here should help answer your question.

64-bit: More than just the RAM

Shawn