Definitely buy with dealer backing. I had tried both the Tin Lizzie and the HQ. I would have chosen the HQ over the Tin Lizzie. I was able to afford an Innova, but I definitely considered the HQ over the Lizzie, if I couldn't buy the Innova. The HQ felt like a better machine. When my old LQS started carrying a home LA (they have 2 Gammills in store), they chose to carry HQ's.
One of the LQS's near my house changed from a Tin Lizzie dealer (which they also rented time on the store machine) to a Gammill dealer (also renting time on the store machine after taking a store class).