So
@wepeeler ... It's fair for non-electricians to get confused by phase and such, and though helpful information, it's not something you need learn if you're having a certified electrician hook it up. When I mentioned 'future-proofing', I was thinking beyond just brewing. As far as brew gears go; Having 10/3 as opposed to 10/2 wire provides the ability to also include 110V for pumps or contactor-coils should you decide to incorporate them in a single control panel. Before we get another page full of responses that tell you you can just use the ground wire and one hot for 110V, I'll say that is cheating and I've never been comfortable with energizing a ground...not to mention it really makes it hard to incorporate a GFCI.
If you're going with a 30A system, the Romex I linked to would probably want this;
https://www.homedepot.com/p/GE-Q-Line-30-Amp-2-in-Double-Pole-Circuit-Breaker-THQL2130/100356511
or the GFCI version;
https://www.homedepot.com/p/GE-30-A...with-Self-Test-THQL2130GFTP/206602329#overlay
On the garage end, the actual recptacle you put in the junction box is largely irrelevant and it could be somthing to directly plug in an AIO, a home-built panel with or without a 110V option, an Electric vehicle charger, plasma-cutter or TIG welder....choose the receptacle that best matches your immediate need, you can always swap it out later as long as you already have the line in place.
Have you made a desicion yet on AIO or modding your current gear?