I know it sounds ridiculous but one of the considerations we had when we were buying a house was if the county we lived was exempt from emissions. We ended up in Elbert County so we are exempt for now. I guess if something changes we will re-register out of state.
I'm actually thinking about registering my truck and trailer back in WY to save on insurance and licensing costs ... CO absolutley rapes you on both.
I'll still have both my bikes plated in CO and a CO driver's license, so if I get stopped they can't really give me too much **** about it.