Hey,
I've never used a fan heater, so I don't know how much help I can be there. My thoughts being that they're not particularly quiet, so if that's going to be an issue, perhaps you could use Oil fin heaters and use a fan to blow through it.
If you do decide to use to fan heaters, I'd keep your normal fan.

Perhaps try ebay for a Temperature Controller? (as $120 seems abit steep)


Best of luck,
pHant0m