• Delta-V vs Batumi in this case, I would be SO interested to have someone with experience weigh in with Pros and Cons on this one.
    -- NICU

I have both of these. There is some overlap, but they're not really comparable. Batumi provides lots of (possibly related) playable LFOs. Delta-V provides envelopes that can loop, slew, VCAs, and attenuators in a small space. It seems to me that Batumi is more useful in your proposed rack.