I agree with rilot..that a TBS clone. it's quick enough, but no quicker than a lot of multi's, I'm afraid. You're paying a pretty significant price for having it built for you instead of DIY, which is your call of course, but it is expensive. What about after sale support? What happens if you lose a critical system chasing after speed boats? that's a lot of $$$ at risk.
It may be a great machine; I don't know. I don't know anyone who owns one, or who's ever owned one. A TBS? Different story...great support after sale, lots on the market, quality build, quality components. It uses DJI arms too, as do many other companies...they're inexpensive, easy to mount, readily available and great quality for the price...what does the OFM use for other important components?