Michelin AC10s suck, esp the front. Anyone who tells you otherwise should be punched. In the face. With a chair.
I used to think the rear was OK, but ran on on the TTR at the 24hour and hated it.
Michy Comp 3 & 4s are pretty good.
LOTS of the Pirelli front tyres are road legal - even their MX tyres. They're not always advertised as such because the matching rears aren't always road legal. Their naming conventions seem designed to baffle you... I ran an MX Extra Mid(?) and thought it was fantastic, but it was hard to say just how good when the rear was so bad...
Not been much of a fan of the new Metzelers although some people love them.