Re: do certain cabs make a difference?
They make a huge difference. We're talking about a plywood box with a bunch of giant paper midrange drivers in it. It's not this un-colored, sonically neutral delivery platform for your sound that some people think it is. And different models are sonically colored in different ways.
People mix and match heads and cabs. A lot. Not everyone buys both pieces at the same time; they look for deals and buy what becomes available. Some players may not like the cab that "goes with" their head. Some swap cabs and speakers around like pickups, always looking to see if they'll like something else better than what they have. Sometimes you try a different cab or speaker, and the difference is so pronounced that it sounds like you change out the head, too.
Yep.