Intel 2600K
Nvidia 760GTX 2GB
3 Acer 27 inch monitors

I use a triple monitor setup as well and yes track ir works a treat with it.

i use TIR as well but it is a bit weird

I recently upgraded to 3 of the new curved Samsung monitors. You can't beat the immersion of more screens for simming, and while it may seem gimmicky, the curved screens on a triple setup give a much more natural flow across the breadth of the displays. It's subtle, but when you are sitting in the sweet spot the curved monitors actually appear 'flatter' than the traditional flat screens.

I also use TrackIR with them.