I've got a Thruxton and a KTM Superduke in the garage. TBH, the Thruxton was a bit of a pain in traffic and around town, so I tended to favour the SuperDuke leaving the Thruxton as a second bike.
But since I fitted the LSL bar risers and superbike bars (along with a change of rubber) the Thruxton has been transformed to an all-day, all-traffic, bike.
Now it's the Superduke that sits alone in the garage, and I'm having a ball on the Thruxton (helps that I've had some engine tuning, suspension, and brake work done on it).
In fact I'm now trading the Superduke in for the new Harley XR1200 - just put a deposit down and hope to pick it up late June
Unless you're prepared to improve the Thruxton, I'd recommend a Bonnie as a second bike. Your shoulder won't like the Thruxton, even if you flip the bars!