Motherboard Recomendation

[Alvin Gunkel]

I've got a colocated system running 4.7 that's got a pretty flakey
motherboard.  I've already moved off the built-in nic because it would
randomly stop transmitting, and now I'm getting random resets.  The
provider is willing to swap out the mobo for me, but the case is 2U,
limiting me to 3 pci slots.  I currently have PC133 ram, but that can be
swapped if needed.  The server handles a fair amount of traffic so a
decent chipset is a must.  What are you running that has been rock solid? 
Any suggestions?

Thanks,

Alvin