Just got this vertical 4x12 from Zilla. Got it to pair with this VHX. It currently has four k100's in it, but I'm planning to swap a couple for v30's in a different cab. The vertical 4x12 with the tip-back wheels and handles are really cool - I got this thing up a couple flights of stairs myself without too much trouble, and it sounds great. I gotta say, this form factor solves a lot of problems with the typical 4x12 - posting here so hopefully more guitar nerds see it! Zilla (and Paul!) are great to work with, and make really solid stuff.

(The two on the sides I ordered a few years back when the F12-X200s came out - they built these from the reference cab specs that Celestion published, and I mostly use them with my Kemper and a Matrix GT-1000 power amp. They're also pretty rad. I've taken these out separately and run synths through that power amp and it's a killer setup for that sort of thing)