I've used the dunlop that came on the bike (didn't like them), Tourance front and rear, an anakee on the front, and a TKC-80 on the front. I understand your tire dilemma.
Currently I'm using a TKC-80 on the front and a Tourance on the back. I'll likely stick with the TKC-80 for the front, but may try a Conti trail attack on the rear for no particular reason.
I used the Z6 on my RT and found it the best tire for that bike as it gave it neutral handling.
Decisions, decisions. Whatever you try have a great CLASS!