[CentOS] Options for desktop?

Sat Jul 7 21:32:17 UTC 2007
Scott Ehrlich <scott at MIT.EDU>

At work I am building and will be responsible for maintaining 64-bit 
Centos 5 systems.   For desktop use, I'm debating between 32 and 64-bit 

I know such applications, such as flash for firefox, are first honed for 
32-bit systems, then evolve for 64-bit.   What other obstacles could I 
expect to face _if_ I chose 64-bit over 32-bit for the desktop?

I'd be installing on an 8 GB dual core high-end Dell desktop.