There's a link somewhere to a guy who ran a 1000 on one side of the room and CMH on the other. In the end the ceramic won hands down. I'll try to find that link.
If you or anybody were to go in a local grow shop you would most definitely be pushed towards CMH. Every shop here in Grand Rapids Michigan are selling loads of them. If they don't recommend it they have stock to move or there head up there ass. I really absolutely think you made the right move.
I'm using CMH 315 for the first time, and it's worked very well. Using it in a closet with the door open, and heat has been manageable. Plant is very healthy (I didn't anticipate the stretch though. More than tripled. First time growing Sativa). You'll be really happy with your new light as long as you manage the heat.