I realize this isn’t really an, er, apples to apples comparison.  There’s probably somebody out there that will tell me why the PC architecture is better or something, but on the surface, it appears you can get a lot more Mac for your buck than Dell.

 

I configured a Mac Pro and a Dell as equally as I was able.  I could have upgraded the Dell to a 256 MB graphics card, but I wasn’t sure which was most comparable, and the Dell price would have gone up even more...