The 5** series are student models, yes. I once played one of those baris, and neither the build quality (especially keywork - really clunky -, but also body) nor the tone were convincing. But the 7** series are good horns - I have yet to wait to try a bari, but their altos and tenors are amazingly well made for the price and do sound nice, too (and that has been true for some time - my 767 is even a bit more charming than a 769, and built to last).
M.