I also recommend giving Dave Kessler a call. He has always been a straight shooter with me, even when I did not end up buying from him. My son has had one of the Kessler model Alto's for two years and it has held up great. I played a Unison for 4 years almost identical in build to the Unison Alto's he is carrying (Though I didn't buy it from him) and it is an excellent intermediate horn at a great price. My son just inherited that from me as I upgraded to a Yani solid silver.
Good luck with the purchase!
Good luck with the purchase!