I personally prefer temp guns but than again I have a fairly bigger about of animals and this allows me to get reading randomly in various enclosure and in my incubator as well.
For a single enclosure this http://www.amazon.com/AcuRite-00891A...te+thermometer which can also be found at Walmart will do the job allowing you to measure the hot spot with the probe the cool side with the display itself and humidity as well.