I like posts like this but in reality you can have the best T-stat in the world but the conditions your enclosure is surrounded by plays a large role. Even the enclosure itself plays a major role! Regardless if your ambient temps are fine and you just need something to control your temps i don't see why a 50 dollar ranco 30 dollar hydro farm wouldn't work well for you?
But when i build my rack and get a little more serious i would agree herpstat pro hands down. again runs 100 dollars +++