Newb there have been several posts urging you to repair the Superstar & keep flying it -- I agree with them. You are enthusiastic, but inexperienced. I suspect that you may be a budding superstar (sorry Hobbico) but ya ain't there yet. Fix it, fly it & keep flying it until you can do everything that it wasn't designed to do, or it is too heavy from repairs to get off the ground. Whatever you do, don't throw it away. I've been flying RC models for most of my life & I still keep a couple of trainers in the stable (modified I'll admit, but they were trainers -- and one of them is/was a Superstar). I'm not bored with them & I'm not ashamed to be seen flying one.

Go ahead & buy the 4*, but keep flying the trainer -- you will be a MUCH better pilot for doing so.