Mario - I'd run the 2 channel Exile Harpoon on the 4 SXT65Q's. I prefer 2 channel amplifiers for this load versus a 4 channel. Running an Exile amplifier also doubles your warranty to 2 years on the Tower speakers. If cost is a concern...I'd ping our website and try to hunt down a demo Harpoon in the deals section. They are on there from time to time. The harpoon will make your speakers sound fantastic and supply them tons of power. It's a better choice on Exile tower speakers. We make 4 ch models as well, but not the best choice.
If your installing this new tower system, you might also look into a preamp music zone controller. It's important to be able to chop the tower off when you drop a rider. Give the office a call at 888-248-0970 and we'll run you through a few options.
Last edited by brianinpdx; 05-02-2012 at 5:09 PM.