Even if you still where a prospective purchaser, you would probably wait until there are several JH600-A's with serious mileage and no stalling issues anymore!
I'm still happy with my JH600, and fortunate not to be experiencing stalling issues like some others do. Just sad to see my only Beijing JH600-buddy turning his back on his JH600's!
Apparently he doesn't like the replacement I suggested either:
http://2.pic.58control.cn/p1/big/n_15602068361230.jpg