Dutch, take a look at an oil filled radient heater. They give off great heat, and are pretty economical to run. I use one to keep my snake room at the right ambient during the winter time. If you can't find one with a digital temp setting, you could always tape a spare Herpstat to it with aluminum tape. and plug it in through the Herpstat.

Speaking of plugs, I know you know this, but you'll need an adapter for the US style plug for the Euro outlets.