Just an update: I tried the K100 and CB75 combo in my 2x12 FL Diezel cab, out of a VH4.
It's actually a really nice combo. The thing is, I found it too raw and gritty, a lot of bite for my taste. It had a very nice tight low end though.
With that considered, I do love a lot of bite in my tone, but the combo gave a more raw, hard rock and grunge kind of bite. I prefer the more Hi-fi tone of my K100 and V30 combo.
It's hard deciding between x2 K100's and a K100 V30 combo though...two very different beasts. The V30 is kind of warm, and that high mid can get a little buzzy. I like a bright high end (I love the T75 high end, but the mids are just too warm, tight low end, and growly warm mids. Any ideas?