When I go for my L2, it's probably going to be with this and either an Aerotech DMS J or a CTI 6GXL J. The latter comes close to Loki numbers.
Based on my limited experience, I'd suggest the smallest J possible when you go for your L2. When I got mine, I used a small J (J315 - 747 Ns total) in a 10 lb rocket, which went to 2000'. It was all about proving I could build a rocket that would fly on a J. Now, that rocket has since flown on a K, and has an L waiting for it. But I kept it as simple as possible for the L2 flight.
I flew a Loki J650 Spitfire in the 1200 case in my Darkstar Jr. on the Salt Flats this summer. The case was so long I had to go drogueless, and barely fit the shock cord in the rocket. That rocket had already proved itself to be darn-near bulletproof when the chute got hung up on a rail button screw and it plummeted from 1300' without breaking (OK, I had to cut 1/4" off a coupler and and replace a bulkplate). More simply put - please don't use the 6GXL for the first flight.
I've been watching your main build thread, very cool looking rocket.
And yes, I know what you mean about that glint... Just wait until you start playing with clusters! Just for fun, I ran a sim with 3 x K627 motors in a LOC TriStar clone that I am building. 11,000 AGL and Mach 1.8. :grin: Pretty sure it would re-kit itself, but fun to think about.