I think the medium Aquaskinz bag is just about perfect as a high-end option. I've also owned several Canyon bags and they're durable but don't function as nicely.
I've also seen people happy with an army surplus bag and some home made tubes. Each to their own...
A few years back we were heading to Block Island for the week and I left my plug bags on the mainland. Fished for days with just a few ho'd plugs in a small belt bag. The fishing sucked but not lugging that awful thing around was awsome
-spence