As always, depends. I love my Spridget, but, it is a 50 mile car. If you want to do any touring at all, from that list I would choose the TR7. (Or better a TR8) They seem to be coming into their own style and respect wise and every review I have ever read says they are capable tourers. That said if you will be doing servicing, I suspect the Spit or the Spridget will be simpler.
In my experience, my cars have always found me.