BUY him one, you just drive it for him! Welcome back, hope your doing well.
I teach the 3 wheel basic rider course. We use the Can Am spyder and Ryker. Those things are amazing and a blast to ride. Sneak over to a local dealer and take a test ride. I think you'll be impressed.
If looks is what your after the HD is nice, but it can't come close to the performance of the Spyder in any way. Not speed, not braking and certainly not cornering. The trike configuration is much more unstable than the two wheels upfront. I push those things hard and they are nearly impossible to lift the inside wheel. I have ridden both( rode a Ural side car as well) no comparison in terms of performance or safety.
BTW who you kidding, I've seen you ride.
Hey Rocket67, Here's a pick of what I did with all those Hot Wheels I bought from you!!