Would you recommend holding out with the OB1-500 until I can grab an SVT then? Just curious, last thing I wanna do is run short on power.
It really depends on how loud you typically play. The lowest wattage amp I would use for a cover band would probably be my AD200B. The bench tests I have seen say 165-170W clean, but it's noticeably louder than all of my 100W tube heads.
Although the weight of the modern V4B is very attractive, I am not really too interested since I own a two vintage SVTs. The RI 4VB is less than half the weight of a vintage SVT, but I like plenty of clean headroom. If I was more into pushing the amp into output drive, I could see some potential benefits in getting a V4B. Also I have a couple of other tube amps that really excel at output drive that are just a bit heavier than the V4B.
If you can afford both the OB1-500 and V4B, and can justify owning both, that may be your best option. I would expect each amp to have a fairly unique sound and feel. SVT and V4B are supposed to be very similar, just different levels of power.
I don't really shoot for a signature sound and I like variety. When I get bored with the sound of one amp, I go to my collection and pull out another. Then I am excited to play again. Consider whether this approach will work for you, or not.
. But they are basement queens, so no big deal except when I need to move them to the work bench.