I made a trip to RMAF last year from the UK and had a great time. Take the time to look around Colorado, some stunning scenery. The show had a friendly atmosphere, perhaps because it is run by an audio society.
I chose my last speakers there, Daedalus DA-RMas and am very happy with them.
Do'nt leave a trip to long. I may be wrong, but I think 2012 is the last year it is gauranteed to continue. Organising the show must be a great burden to the Colorado Audio Society, particularly after the sad loss of Al Stiefel, the instigator.