My Zagi XT is alot of fun, not necessarily something I'd call a trainer though, especially launching, it's a major pain. You are correct, they are virtually indestructable, well at least the ones that are made in all EPP.

Something you might want to do is try out the building element, this way when you crash, you can make new parts on your own. Look up Simple and free first foam flyer in the foamies section, that's an easy one to build and it's an excellent flyer.