I may hold out for one of the pf115 cabs. My only concern is that the cab is 23 inches wide and the v4b is 24 inches. I know it's no big deal if the amp hangs a little over the edge......but that drives me nuts.
I also thought about getting another b100r and use a splitter to run both but I already have the v4b and would like to use it. Plus I'm still kinda confused about splitting the signal. If I understand it right the splitter will cause my signal to be weaker to the 2 amps as opposed to just plugging straight in one amp. My fishman has a 1/4 output and a tuner out, I thought I could use that to split the signal between 2 amps but I'm not sure.
I use a Fender pedal tuner to split my signal when I run the B-100R and my B15. No loss of signal through either jack - just that one shuts off when the tuner is engaged (which it should).
You could always get a pair of those new PF cabs, and set them side by side. That way the V4 wouldn't over hang them