Hi Kot,
Yes, I am still using the JA80 MKII. It performs much much better than the time I posted after fully run in! It was easy to pair with preamp. Depends on your budget JA80 was obviously better than 30 imo. Normally the JA80 was more than enough to drive difficult load of speakers already! Though the upcoming JA30 equipped with KT170 worth have a look too.