I was reading Aaron's post. The lower half of your post really hits the nail on the head.
I'm excited for Behringer's new case. It's huge and rumored to be around $200. It's probably a lot larger than you'd need for a basic entry-level system. But if you're new to modular, it means you have room to add almost anything that you wish. This allows new Eurorackers to experiment and reconfigure their set-ups based on their first-hand experience and preferences.
Once you've found your ideal set-up, you can always transplant your modules to a smaller case that will fit your specific collection. But if you start out too small, you'll hamstring yourself into making compromising decisions.
If the rumor is true on the $200 case and the specs are decent, I'd definitely recommend it as a starter kit. The power supplies for their synths seem acceptable so making an empty box with a power supply in it should be a no-brainer.