Tony, I agree on the technics - it was horrible! However, contrary to UD's statement, I have heard some outstanding vocal harmony come from Yamaha VH systems.
This was written way before the VH2 and Dan really provided a lot of great information on the old system, all of which can be utilized on the VH2, but most people just don't want to take that much time to set up the system. In this world of instant gratification, they tend to want something that makes them sound great right out of the box, and without reading the instruction manual. I do all my vocals through the keyboard's vocal processor, however, I use it in line with the TC Helicon Harmony-M, which is no longer available. Later tonight, I'll record some comparisons and post them for you folks to decide which sounds best. You may be surprised, just as you were with the headset mic V/S the handheld.
All the best,
Gary