The real competition to the BX500 is the Genz Benz Shuttle 6.0. Why hasnt there been more discussion about this amp? Im at a toss up between the bx500 and shuttle 6.0 or even the shuttle 9.0. Both of these lines have a switchable power supply, bx500 auto switching which is nice. I live in Germany so I need equipment that will work off of 220v 50Hz but I will be returning to the states in a couple years so it has to be able to run 110v 60Hz also. The Markbass equipment is available with 220v power supply but it is factory set and has to be special ordered that way and cant be switched back so it is out of the running. These are the bx500 extras over the shuttles. 2 ohm operation, autoswitching powersupply, speakon with the conventional TRS outputs. The shuttles have only speakon out and sooner or later you do run into a circumstance where TRS is needed...I hate having to buy and carry adapters with me. The main selling point of the shuttle to me is the extra power and track record which is the most important. I can only go off of the fact that I cant find threads about problems with shuttles. There is of course the price difference but thats no concern to me, I want quality/longevity over a deal saving $150. Can anyone help me make up my mind?