it really depends on your budget but be aware that cheap is not always the best way to go. you can get cheap at reptilesupply.com. maybe they'll have other ones there as well.
my current collection
1.2 kiddos
1.0 better half
0.1 mojave ball python (Nyx)
0.1 Dumerils Boa (Hemera)
1.0 Eastern Box turtle
3.4.? rats (? = litter coming any day now)
0.1 dutch rabbit (Lucy)
my "future hopefuls"
0.0.1 pied cockatiel 0.0.1 white bellied caique 0.0.2 guinea pigs
I'll just second that. Mine got up to 120 F without a thermostat, which I've heard can burn humans after a few minutes. I've heard tell of them reaching 150.
Had a quick question regarding this topic. Can a dimmer switch on the uth work as well too?
Yes but they are not as reliable as a thermostat. The temps can still spike with a rheostat and you will need to adjust the rheostat fairly often to maintain a constant temp.