Same. Every time I play an all-tube head in a shop, I think "THIS is the sound I want, just without all that fluffiness." It could be that I've just played through cabs that were tuned low or inherently muddy. Not sure.
I will say that I recorded an album recently where the studio had a Mesa Strategy through a Traditional Powerhouse, and I did NOT like the tone. Every Mesa head I've played through sounds "dry". Not sure the best way to describe it, but Mesa and Orange sound the same to me. Sterile and dry.
I *almost* love the Ampeg sound, but most of the time the lower frequencies just seem kinda slow to me. I want to tighten the bottom end up, but keep everything else. Again.....could be the cabs I've played through.
I once found a perfect sound - it was a PF50T through a GK NEO 410. That setup rocked, but I was just shopping around at that point and couldn't buy at the time. I may try something like that where I pair the V4B with a NEO 410 and see what happens. That said, I'm becoming a fan of the 2x12 setup for form factor. I may try to find a good vertically oriented 2x12 to use with whatever head I end up buying.
If you're serious, then I urge you to put in the time and read the thread that I copied you on. You can't imagine how much there is to learn from the perspective of others. I've been playing through a solid state Markbass 1200SD, with two Markbass sealed 4x10's, and two Markbass sealed 4x8's (both with horns).
Eveyone has always smothered me with comments about my pristine tone, and while I agreed, there were times when I felt anemic and empty. I knew that tubes would be the answer, and when I started shopping, same as you, none to try, heavy and expensive to ship... and tons of conflicting opinions.
The V4B had the killer appeal to me, but I IMMEDIATELY dismissed it because I thought (for no good reason) that all Ampegs were vintage and muddy, and it was a puny 100 watts when I'm use to 1,200 watts.
I reached out to Jimmy M and he basically said, you'll love it, get over it. He was right... a little too right actually.
I was so hooked, that I immediately picked up an Ampeg Heritage 810 cab, but I didn't like now having to move the V4B back and forth between the recording and rehearsal studio, so I now wanted another tube head!!! BUT! The head that I really always wanted was the Mesa Prodigy or Strategy... and while looking at them, I saw their Standard PH412 cab.
So like you, a lot of money to consider, none to try, and more differences of opinion than Ford vs. Chevy.
I think 50% of the people on this forum will disagree with whatever I say, but I think they'll all agree with this...
If you stay a bass player, then sooner or later, you're going to get tired of dreaming about what you want, and you're just going to want it and be done. Cutting corners with gear will only ever be a fleeting substitution. If the sound that you want comes from something that you know exists, then just do what you have to to get it.
However far from reach it may seem, it won't look that way when you're buying your first tube amp at age 70!