I've never tried Maxxis tyres, they might be worth a go. Isn't Maxxis the 'off-road' name for Cheng Shin or something like that?
I've been trying to get decent dual purpose tyres, the 17" rear being the one that causes grief (F650GS Dakar).
I've tried:
Trelleborg Army Specials (did Red Kite 2007 OK but wore quite quick on road but I was doing a lot of frequent heavy braking)
Metzeler Enduro 3 Sahara (better than I expected as long as it's dry - in the wet mud I spent a lot of time picking my bike up)
Dunlop D606 - my favourite so far but not certain if allowed in UK (I was in US at the time). Good grip and seemed to last well on road.
Metzeler Tourance - best tyre I've tried for on road but would not go anywhere near wet grass with them!
My plan was if I can't use D606s then I shall either sell the bike, change the wheel size to 18", Trelleborg Army Specials or Michelin Deserts but those M-6006 might be worth a go.
BTW:
http://www.trelleborgtyres.co.uk/product_details_32.htm