Which sidecar for my Shadow 750?

Just bought a '98 Shadow 750 ACE Deluxe with the intent of putting a sidecar on. My main purpose is to haul along my 85 lb German Shepherd. I like the looks of the California Companion GT and the Legend. Maybe the Steib S500 replica. Yes, I'm hung up on looks.

I'd appreciate any advice on which car would be best for the dog. He likes to sit up for a bit, but he lays down on long trips in the car. Which car will have enough room for him to lay down?

I talked to an airplane mechanic who can probably get me a lexan "bubble" to put on so I don't have to tie him in. Haven't looked into this much.
I also saw many references to the "Yellow Book". It's now on my christmas list! 🙂

Thanks in advance.