I just had a couple of minutes with Helix Stadium and - as expected - it‘s awesome!
At first, I wasn't sure how much I would like Focus View. But after Eric showed me how to activate it and I played around with it a bit, I was honestly thrilled. No matter which Focus View settings I selected for amps, cabs and effects, everything sounded fantastic and gave a great impression of what each block is capable of. It‘s extremely quick to get great sounds just using Focus View.
I couldn't really judge Agoura because of the headphones, but my first impression was definitely positive.
John Browne played a Stadium during his workshop and he was very enthusiastic about the dynamics.
Conclusion: I want one.