Amazon gives away the new U.S. episodes when you buy the U.K. ones - or at least they did last season. It's not as though the original show is in a foreign language; I really don't see what the U.S. and Aussie shows add to the franchise.
Maybe if they'd managed to snag Leno during his hiatus period, then the show would've been watchable. He'd be a natural for the "Clarkson" role, in a somewhat less curmudgeonly sort of way. Ah, well.
Leno would be good. I think Dennis Leary might not be bad in the place of Tanner but you really do need someone who really knows cars.
I never really had any appreciation for European cars but I've fallen in love with the Aston Martin since watching Top Gear.