This one looks better than many, because it has a 750 watt setting in addition to the common 1500 watt setting. And it has a digital timer for auto shut off, which must be safer too (overnight):
TVH500
[EDIT: and this one uses less power, is far cheaper, tho without as many cool features and probably with half the heating area abilities:
http://www.vornadocentral.com/produc...o-vh101-heater