I think it depends on whether you want to fly 40 or 60 sized birds at this stage. If you want to move up to 60 size gear go for a 60 trainer so you'll be able to use the engine in your next project. I personally prefer 40 size (easier on the pocketbook), so I would go with an Avistar, or perhaps an Easy Sport (it's only a little more difficult to handle and has a little more room to grow).