[newbie] smp questions

[pete moss]

i have in mind doing some system hardware upgrades, one of the things
that i am thinking about upgrading is my processor.  i currently have a
PII 350.  my motherboard can support up to a 450.  i am also considering
getting a smp motherboard and a second chip.  is there a good cheap
motherboard that supports this, as well as agp, isa, and pci?  do the
two processors need to be the same speed?  also, is there a better place
to compare prices than cnet.com?

tia
:P