yea i think hhkb 2 is the way to go. Even if CMstorm drop the Topre bomb. HHKB will still be an elite Topre Japanese board(from PFU systems)
I game on my HHKB just fine. after a while, and setting the left windows key to control key and delete key into backspace key, i can play well on HHKB. But yea, gaming on Reds is superb i must admit, those switchs are so light and responsive. That said, gaming on HHKb is also nice.
About the arrow key, your neuronal cells just need to fire together and form networks to get used to it. Now, i find my self reflexively reaching for that fn key every time i want to use arrow key on hhkb. So, it is not much of a deal.