An AW1A is a good choice. That's what I use for my main torch. I use tip sizes 1-8. A good starter set is an AW 201,203, and 205. Some people are pretty particular about their regulators, but I don't think this is something you really need to worry about. I just asked the counter person for advice. They are going to need to sell you adapters anyway. If you live near someone that repairs regulators, they would be a good place to go to buy.

I would get small hoses instead of the big ones. I'm somewhat reluctant to recommend teflon hoses, if you drop something hot on them it's going right through. Tinman Tech is a good source for that. I got some 'a' size hoses somewhere, but I don't remember where. Maybe McMaster Carr.

You definitely want either an A1WA or a J28 (or clones) aircraft-style torch. Unless you're a weightlifter, the bigger torches are a workout and nobody needs that when building a bike frame