If you are going into business you definitely want the longer table of 12 ft to accomodate all sizes of quilts.
I have the HQ16 with ProStitcher [PS] and will soon be buying a longer table so I can do larger quilts. The Avante and the Fusion are much bigger in the throat space capacity and the PS software is even better than what I have with my HQ16 PS.
I've tried the newer machines and love them. If I didn't have budget considerations I'd sell what I have and get a newer model.
Maybe if I bought a winning lottery ticket I could do that. Too bad I don't buy them except maybe 3 times a year, if that, and then only when with one of my friends.
ali