well d00d i have no hands on experience with either, but the way i am personally i
would pick that opteron over a xeon anyday, just like i would use linux over windows
any day .. i am a huge fan of amd, and that goes without saying, because amd just
eats up an intel processor, especially when it comes to a opteron, cause them bad boys
can have the FSB clocked at the speed of the processor, which is just totally rad,
amongst many other things that make it better ...
oh and also, there are many other board manufacturers for opteron boards, just take
a peak here --> http://www.amdboard.com/opteron_boards.html