I use a Crown 2502. Over 400 wpc into 8 ohms and 750 into 4. Has all the headroom you will ever need and the new model has some really nice features. I have never heard the fan come on and I have never approached the light that is within 20% of clipping. Speakers I drive are a little more efficient than yours, but not much. Sounds great, costs less than $600 and will drive just about any speaker you are likely to want.