I saw the new Victoria Arduino Mythos 2 w/Gravimetric at the NY CoffeeFest. It has the Clima Pro 2.0 temp control, 85mm burrs, variable speed motor(600-1200rpm) and Gravimetric weight-based dosing. All in all, it was pretty impressive.
It worked great on the demo table. The only downside (I think) is the wait time while the portafilter is taring. It takes about 4 seconds to start grinding after the portafilter is engaged. But it nailed the dose weight every time with a nice fluffy pile of coffee.
It's a bit pricey, but I'm getting tired of my current grinder. It's too clumpy and the timed dosing is sketchy at best. Constant temperature will also be welcome to handle the rushes.
Interesting that their parent company, Nuovo Simonelli, has not incorporated the Gravimetric feature into their current Mythos 2...http://simonelliusa.com/images/Mythos2-VA-Brochure.pdf