Hi there, a lot of people on here are against heat rocks because the earlier models were dodgy. As to wether this holds true for the newer ones is debatable. Personally i had one for about 6 months without any drama at all. So wether you need to sell it is really up to you.
I've raised the question previously on here as to wether the newer ones are ok and got no negative responses at all. Personally i don't think one from a reputable reptile supplier would be a problem, it's the cheap ones i'd avoid. Lets face it some of the sponsors on here sell them so how bad can they be, unless they are selling dodgy products.
In my opinion if there was a problem with them surely the manufacturers would have rectified it as they have been available for years...
As for the light 100w in an enclosure that size will make it tricky to get a thermal gradient in there. You are better off getting a proper heat lamp from a pet shop as they will concentrate the heat on the basking area.
Ben
EDIT* Oh yeah and HAPPY BIRTHDAY
