so i tried both setups very quickly and got some decent results.
for the first setup i inquired about -- PB dry sound into a 4x12 (V30's & 75's X config) then PB EFX send into chorus pedal (forgot to bring home my delay/verb pedals

) then recto EFX return into 4x12 (Vader).
sounded good!! i liked what i heard and i can't wait to try it with some verb and delay. I was mostly interested in this configuration for when Mr. Fortin can install an FX loop in my cali modded marshall
The second setup -- PB for highs and some upper mids, Recto setup for Lows and lower mids (same cab configs.) -- i wasn't as thrilled with. It didn't sound flubby, but maybe just a tad bit on the fizzy side. I would like to try this again tomorrow, when my ears are fresher

, but this time swapping the cabs...Engl --> Vader 4x12 and Recto --> Marshall 4x12 with 30's and 75's. I don't think the recto sounds particularly good with the Vader; maybe a tad bit dark sounding and a touchy on the boomy side.
Thanks to both of you guys for all your wonderful insight! i love trying new gear configurations with old gear...makes everything feel new again