This thread has definitely had more than a little influence in me buying this Cayman. It's a 987 2.7 120k miles with a pretty good service history. 5 days in, loving it so far.
If you've been to the Bulldog Bash, you'd see them turning up mainly in modern flash cars... Jags and the like. Bike's (HDs) are trailered there by some for show purposes.
Mine had a reasonable level of strength after 5 weeks. If you keep that arm in use, but gentle use, you should retain most of the muscle mass too and not need physio.
I use a Salt u-brake similar to this, as a rear on my Moser MTB. It's excellent.