I personally would just use the plastic coated cable clamps like http://www.homedepot.com/p/1-4-in-Pl...5UVB/202878268 over staples. And while it's true, a RHP will create a hot spot if you put something under it to heat up, it won't create that hot spot if the ambient room temp is close to the set cool side temp. That is why I said, if you are in a room that is under 75F, then a RHP will work great as it will be on a decent amount of time. But if you have a room that is 78+, the RHP wont be one much. I have my Herpstat set to 80F on the cool side with my RHP in a Constrictors NW cage and it almost never comes on. In my AP T10s I have only flexwatt set up and it keeps a nice 90F hot spot on one side and 78-80F on the cool side
As for looks, I guess it personal preference. For a white cage like my Constrictor NW one, the RHP blends in but for my black AP T10s, I just don't like the look of a big white square thing bolted to the roof of the cage. Plus if you go for Ap installed LEDs and shelf, it can take a bit of fiddling to get the RHP place right unless you are going for a T25 or anything that is 30"+ deep.