Anyone know a good CPM network?

Hey guys, I was trying to find a network that has good CPM ads and is trustworthy and actually pays, lol. But I have been doing alot of other types of markets and thought of a niche I want to try out to see if this could be my path to go down. I also have not had alot of experience with CPM, mainly CPA which can be difficult at times, so is there any advice you guys might have about doing CPM or has anyone had any luck with it?

Thanks alot guys, much appreciated.

Try ValueClick and TribalFusion, both are good.

awesome will give them a shot, thanks man

TrafficVance is pretty good.

TribalFusion is my favorite in case of CPM you can try it out.