The habistats are quite a solid unit. I would second it for sure. There is a proportional unit and non proportional I would recommend the proportional one. Habistat also makes heat mats I would suggest that as well.
I deal with John and Mel every so often and can say they have super service perhaps better than almost any supplier I have had dealings with certainly on par with the best!
http://www.bigreptileworld.co.uk/hea...stats-10-c.asp
I think I once saw a 110v version but by the time you get it to N. America I don't think it would be worth it, 70$ give or take plus shipping 20$ and then duties perhaps (I know Canadian ones not US) that places it in the herpstat range and they offer more features. The vice versa is true the herpstat would need step down system and US mats at that point it is not worth it either.