My only hesitation on the D3 is the poor review on beaconreviews.com
If they work out the kinks though, I would probably go for it if the Tracker 2 doesn't materialize.
I did some additional reading on the Tracker 2. Sounds like they delayed release to work out any possible issues, which is not a bad thing. I think you are right though, it is a big "wait and see" on it, and it may not be prudent to pick up the first run off the assembly line.
The Never Summer SL-R is the best all mountain board I have been on... Ever.
Buy it... Ride it... Love it...