Which brand of fireplace ?

I have a 12'X30' room addition that I would like to install a natural gas fireplace in.
I would like to back vent and have blowers to circulate the air. The bells and whistles don't matter.

There are so many brands out there, I thought I would ask around here to see if any of you could give me a suggestion for a brand that is furnace rated, very efficient and has a good reputation.