After a quick demo, I gotta give kudos to the IK devs who brought these Ampegs to life. Very good sound from all three, taking the collection to a new level.
I compared the SVT-VR with the UAD/Brainworx version, and was able to get them to sound pretty close. Had to do some fiddling -- the same settings did not necessarily produce the same results. I still prefer the UAD's sound overall, but A4's cab/mike selection features make choosing those much more fun. (Another point for UAD is that it doesn't eat your CPU as A4 tends to do -- of course, the required DSP hardware isn't super-cheap.)
I didn't have time yet to compare directly the B-15N with its UAD counterpart, but from what I hear, it's also fairly close. Classic tone with great control of dynamics.
The V-4B surprised me, as I hadn't heard a model of that one before. Really liking the sound of it. Could be a go-to.
Taken together, the new amps cover a wide range of tasty flavors. I'd say the SVX 2 upgrade is a no-brainer for those who already own the original bundle. Nice work!
Cheers,
Eddie