the pc lights should have little affect on your tank temp, just keep a close eye on it though and if it increases too much i think it is easy to instal some kind of fan to help. The light you will have will be good for shrooms, softies, and maybe a few of the lower light lps corals, no sps or clams thought.
"eddited"...the price sounds good for that set up, about what i would pay for a simillar model.
Sea Goblin