I am in the same situation to the tee... I just told my dealer to hold off on processing my deposit on the Z1000 it has big shoes to fill when it comes down to replacing my ZRX 1100. I however like the exahust on the bike but I know for a fact that it won't be load enough for my liking and will have no choice but to replace it. In a perfect world muzzy would come out with an identical looking system!!
Life is better spent at 45 degrees