Of the modules mentioned, I have A-145-4, Quad VCA, 3xMIA, Pam's, and the Out v3, and like them all. One nice feature of the Out is the cue input, which lets you audition sounds being constructed without repatching. I also have 3xVCA, and should have considered Veils as a Quad VCA alternative. As a Maths alternative, I was considering the Cosmotronic Delta-V (which is small) before I went with Falistri. I really like Falistri, but I wanted more than two envelopes, and to be able to use it as one or two oscillators. So I added Quadrax, which is packed with functionality. You are tight on space, so some careful planning is needed, and then availability will be an issue...