I use an aquarium heater and it works great. I also have a $5 pump from Harbor Freight that keeps things circulating. I have noticed a difference between using and not using the pump. Use a splash of bleach to keep things April fresh.
I'd be careful about your temps, though. Your fermenting wort will bring up the temp 5-10F, so you could be looking at 75-80F wort temp, which is way too hot. I think you may need to consider fermentation chilling, not warming. My heating system works great, but my ambient temp is below 60F for most of the year. Also, the heat generation of fermentation is very nonlinear, i.e. cooler fermentation adds less heat, warmer fermentation adds more heat. For chilling, I use the "son of fermentation chiller" and it works really well (with my extra mod of a remote thermistor).