Vortex Sound Research

I am going to have an Expert Sleeper's Persephone in my rack and am looking for a good second VCA. Doepfer is good value for the money, but too deep for my rack. I was looking at an AJH VCA with mixer but I felt like, following the 'more VCAs is better', perhaps I should get something like a Quad VCA. I'm eyeing the Erica Synths quad VCA, they are supposed to have good build quality. The Intellijel seems sold out where I am. Any suggestions as to VCAs with great build quality that would serve me well?