The B381's are a top rated LRR tire. You will lose MPG by switching to almost
any other tire, but probably not very much unless you do something drastic
like bigger rims and tires together.

You didn't say why you were considering a switch.

LRR is measurable and is not a scam, see this article:
http://www.greenseal.org/recommendat...resistance.pdf

If I was going to switch, my primary considerations would be a high sidewall PSI,
good wet performance, LRR, and after that whatever made me feel good. I prefer
M+S tires too. Once you add all those req's there is surprisingly slim pickings.
The Dunlops on the HCH-I/CVT might be a good switch. Whatever is on the
HCH-II might also be worth considering if it comes in our size.

This is purely anecdotal, but I hear more complaints in these forums about
the Dunlops than the Bridgestones, but there are more CVT owners also,
so it may not mean anything.

I have the B381's, and they seem just fine to me. I am not a tire freak
though so maybe there is a better tire out there, but unless you can be sure,
the B381's will probably do just fine.

- Kurt