Yes, go for an 8hp version at least. The bigger the better though.
This doesn't seem like it has much of an advantage over the default System Coupe. It definitely won't look as nice! Pam's can accomplish essentially everything that Marbles can (and potentially more given the inter-channel logic and variety of waveshapes) if you're willing to do the work with the encoder. The hands on experience of using Marbles is the only plus to this IMO. I totally get why that would be attractive for someone who is new, though. With some patience you could use the CV ins on Pam's with the Quaid for interesting high level automation.
You might just consider getting a larger case if you want to come up with your own rack, it'll be cheaper than expanding in the future from a 3U 84hp.
Good business with @Modularwave. Fast shipping, quick replies, as described, and I get a Trigger Riot to boot.
