I've been running a Spitfire for several years and have been pretty happy with it. Now, the upper "sound" button on the remote has begun to get really hard to push (as in almost impossible). Plan to send it in for repair but I've been thinking about upgrading (and I can't be without a call for 2 weeks, right now ).. Any experience with - or what do you think - of the Crossfire? thnx..g