I always liked the Guild humbuckers. They sound a heck of a lot better than the Fender mudbucker, and are pretty even.
I have been a big fan of my Ampeg BT-15 for a while now. I hardly ever gig, but that is my go-to amp now. Old school, but lightweight, and sounds fantastic, like any Ampeg I ever owned. I never owned an SVT. I had an opportunity to buy the first year one (with the oddball tubes) but it weighed too much.
I don't have any preference between tubes and SS. Obviously you can get a lot more power in a manageable size with SS. I can't think of too many situations when I would need more than 100w even with bass. Headroom is nice, but deafening volume is what you typically get.
I like most amps, as they work or they are fun. Except an old Alamo bass amp I had - that stunk.