Bill -- Both are fine machines. Don't let the little things dissuade you. I have an L3010 and occasionally (like on slopes, which is most of my land) have the same problem you mentioned with switching ranges. Letting it roll an inch or just slightly depressing the
HST pedal lines things up just fine and lets the level slip into place.
You didn't mention your feelings about the dealers. You'll likely have a decades-long relationship with the dealer, so if you have a better feeling about one over the other that's also something to consider.
You're right, despite the narrow
HP difference, the 2910 and 3010 are way different tractors! I've used Clementine hard for over 400 hours and love her more each day. What an awesome machine!
Pete