You're not going to find a P2008 with 500# useful load. So if that's a critical issue, you're best to cross it off your list.
Now if you think the FAA will increase the weight limits for LSA in the near future, the P2008 has already been certified to 1430 lbs under EASA. A simple document issued by Tecnam would make that weight limit apply to any P2008 if/when the FAA ups the limits.
Of course that could be next year, or maybe three more years away....
I owned a P2008 turbo for over 3 years. Loved the plane. Great climb with the turbo, speed, flew and landed wonderfully. If it fits your mission, I can't imagine you'd be unhappy with the P2008.
(I'm moving up for more speed/pax, so that's why I sold it.)
Excellent story Andrew! Congratulations on fulfilling a lifelong dream!
As to radio work , what helped me was buying a handheld and going to a fairly busy airport and tune in ground, approach, tower, etc. it starts to make more and more sense. There are even some good YouTube videos on radio work.
From Dan Johnson's website, an article on the 915is in general, and the Bristell in particular:
Here's what early Bristell test flying showed:
Maximum Cruise: 280 km/h — 175 mph — 152 knots
Eco (lower fuel consuming) Cruise: 260 km/h — 163 mph — 141 knots
Fuel Burn in Eco mode: 23 liters/hour — 6 gallons per hour
Fuel Translation: 27.16 statute miles per gallon at 163 mph
I really liked training in the Skycatcher. It was my solo airplane, so there's a strong attachment there. Very fun, stable aircraft. On the negative side, future factory support, the seats, and the spartan interior.
As a Tecnam P2008 owner, I can say I am very happy with the way this aircraft lands. Compared to the Skycatcher I mostly trained in (which I know is not the CT), the P2008 is much more solid and straightforward to land. It's nice to have choices, and best of luck to you!