Drum Machine w/ Bass?

[Jeff Shirkey <jcshirke@midway.uchicago.edu>]

I was wondering if someone could tell me what some of the better good  
drum machines + bass are. I want something that I can put on a loop  
of my Switchblade GL for rhythmic backing. If a software option is  
better than some standalone hardware box, that's also an option.

Basically I am looking for rhythmic accompaniment while I play  
guitar. I have an EDP already, but I need something else for drums/ 
bass lines.

Thanks in advance.

Jeff