Yes, nice. I flew a Quantum 912 with an instructor for about 75 minutes back in April 03. Loved it.
I also got to fly an Airborne with the 912 motor in July 04. I was real impressed, too. Plus, the Airborne guys at Oshkosh really explained their product, and knew it well. They seem to have a high quality product, and good support.
Those are my two favorites. I flew an Aerotrike many years ago on my first trike flight. I hear good things about them too.
All-in-all, I'd say I'm leaning heavily toward the Airborne. Thoughts?