I'm currently running
a VH-4S and an UltraLead in stereo, and the combination is KILLER.
If you're looking for something looser than the VH-4, the UL is definitely the wrong amp - it's THE tightest and dryest amp I've ever used, but the two voicings are a match made in heaven.
The VH-4 tends to be a bit over-compressed, while the UL is totally uncompressed and extremely dry. The UL is also VERY unforgiving.
Together, you get a tone that's got a ton of clarity and tightness while still being more "open" than the regular VH-4 tone.
Adding the VH-4 to the UL really helps to "smooth over" the unforgiving nature and thicken up the dryness.
I've honestly never been happier with my tone. I tried the VH4/UL combination out hoping that it wouldn't work that well (mostly so I don't have to carry two full 1/2 stacks to gigs), but the tone of the two amps together is so perfect that I'm now a guy who has to bring two 1/2 stacks to shows.
I can't really vouch for the CL or CLX, but I'd imagine that they'd be very similar to the UL...all 3 amps share the same preamp (but the CL doesn't have a clean channel). From what I've heard, the Deliverance series is more vintage-voiced than the Pittbull series. You might also want to check out the Sig X if possible, I've heard that there are a LOT of tones available in that one.