So, at the moment I am looking to upgrade my amp rig. Definatley going to go modular, looking at getting a pre/power setup, probably with a QSC RMX 850 as the power. I am kind of tight on money, so I have been scouring ebay and watching classifieds to try to get a good used deal. But my question is this: I have played a number of amps, cabs, etc. But, I haven't really mixed and matched much. If I like an amp, and I like a cab, will I necessarily like them together? Mabye an example helps. I tried a GK 700RBII head through a GK 4x10 cab in Guitar Center a few days ago. Would I be likely to dislike the head putting it through an Avatar cab? How much would the sound change? Should I avoid buying before playing the specific item that I am buying to make sure it's really what I want? Hope the question isn't overdone, and it made sense.