Good question. The Base optimizes the suspension and permits use of the cable isolator. I bought my 2001 with the base because it was the only way I could use it on a wall shelf. The motor would have had no place to sit without it. If I didn't need the base, I definitely would have gone for the 2200 and upgraded later. It also lets you move the table as one unit, without removing the feet or the motor. Frankly, in the world of high-end, $2K doesn't buy that much, so in that context, I think it's worth it. It also looks very cool, which is part of the experience, IMO. Frankly, I'm not much for screwing around with A/B comparisons, so I never bothered to compare the sound with and without the base.
