If you don't like mix/match:
stock tires- pirelli scorp MT90. The back tire is a great street tire, IMHO, but it doesn't last as long as I wish it did.
Conti trail attack: good life, great dry grip, I don't like them in the rain as much as the scorps or the pilot road 3 (see below). Very round profile, really easy turn in (for me, it's too easy and not enough feedback)
For mixing and matching:
I've been running the pilot road 3 in a 160/70/18 on the rear for street duty. I think it grips better and lasts longer than any other option I've tried. And I'd have no hesitation taking it on fire roads and such, it's just as good as the trail attack.