Note: Be weary of rigs who state they only work with a specific pool.

A dozen 290x's scattered across 3 rigs.  Tuned with "summer settings" (no powertune, little to no OC) this "mini farm" shows up at 34.5mh in CGRemote.  

Leasing as 31mh even, giving you about 10 percent extra to account for stales, slow pools and other "general wackiness" that tends to eat up hash.