7870 Crossfire

Going to be picking up a 2nd XFX 7870 to crossfire with my current one due to holiday deals.

Was wondering how I should set up my 2 monitors.

Both monitors into one GPU or split them.

Just some general info on crossfiring would be much appreciated.

All your monitors will be plugged into the top card, disable ULPS(google it), and get the latest drivers. Pick your best monitor for gaming on as 2 screens gets you a seem right in the middle of play.