Congrats! I am in the exact same boat. Scored a NIB on Armslist - battleship grey. Really wanted to go with an SB Tactical but NO ONE has them in black. FDE is everywhere. Nearly ready to pull the trigger on the 922 CZ kit instead of waiting. That stock in about 1 1/4" longer than the arm brace and very solid. Haven't handled an SB Tactical. Just haven't warmed up to an AR tube style set up. Too bulky for me on this gun. Looking at all you get with the CZ 922 kit, the SB Tactical is overpriced for what it is, but it is saving you a $200 stamp, and they know it.
Check out
www.hbindustries.net They make some very nice micro conversions with 2 barrel options for a can. Reasonably priced IMHO. I expect they will get some of my money before this is over.
I have no real NEED for a Scorpion. But being a CZ fan and it caught my eye, I couldn't resist at the price I gave the guy who was just fired from his job. He only had it 2 weeks.