HEY MAJOR! QUIT YELLING!!
Take your amp to a qualified Ampeg tech- There are a lot of good ones around.
Have them 'scope it, and evaluate what it needs. Caps, tubes, whatever.
Then let them tell you what your options are, and what they cost. You need to replace power tubes in pairs, and the amp has to be biased correctly to sound right and perform well with the tubes you choose. Usually they run 6LG6's, or 7027's,
I don't know if it can or should be run with a KT-88's for example. Costs vary too, depending on the tube mfr, from reasonable to high $$ for exotic NOS tubes. Take it to a good tech!
Cabinets- I run mine with a 4x8 and love it, very focused. A 4x10 would probably be more common,and would also rock.
Add a 15 and you cover a lot of ground, tonally.
There's a number of good cabs available- Get your amp looked at BY A TECH then A/B it to see what you like.
Oh, BTW,
I really like MY V4BH!
