Vortex Sound Research

I've been eyeing this a while, but I wonder whether it's certain to poop out in a few years. Is there a market for replacement parts, and (assuming I'm near a metro area), technicians that could keep it running for me ? I'd like a QY70 because it's cheaper, more available, and I don't need the extra features of the 100 (unless the screen is bigger), but it's 3 years older.