I've heard the SL-1200GAE at an audio show and despite the lousy cartridge, its speed stability was excellent. (For $4K, it'd better be!) Fremer had a sample of it uploaded on Analog Planet, and it was not all that far off from the same sample recorded from his Continuum Labs rig. The G and GAE are a ground-up new design that shares only its looks with older 1200s. I would have to do some serious thinking if I were shopping for a turntable with that kind of budget, as there are others I'd be interested in.
Technics also now has a modern equivalent of the SP10, the SP10R, with the new technology, and sized exactly the same as classic SP10s (the drive unit, plus the outboard electronics box) so it can fit into existing applications. The new SP10R equivalent also comes in a version mounted in a plinth, the SL1000R, with the ability to mount two arms (using an accessory kit to add the second arm).