So, you have dualies. Of course you wouldn't choose nforce2 then, it's not even for multiple processors.
Stability may be good, but a nforce2 or kt400 system with plain unbuffered ram is more than stable enough for almost any kind of work besides the heavy duty database, 24 hour, number crunching, mission critical stuff.
In any case, it certainly doesn't warrant your comment about never buying a nvidia chipset.
_You_ might never buy one because of what you need to do, but it's not good advice for everyone else since they don't have the same requirements as you.
And frankly, a properly setup nforce2 or kt400 system can handle number crunching just fine as long as you have decent parts to go with it and use conservative settings. You'll want the uber-reliable ECC stuff for lab conditions though I admit (and of course nf2 isn't going to be able to use that).