I dont really see any issues with RBI RHPs except they use an ABS plastic body where as Pro Products uses an aluminum body. I have heard a few issues with RBI RHPs giving up the ghost after a couple weeks though but i personally think it's user error as in they were mounted too close and overheated. Remember, you have to have at least a 6 inch air gap between them and the object below them or they could overheat.
I personally prefer Pro Products though and will be ordering one and having it shipped to AP next month for Pats cage.