The new 120AX is a real "Stump Puller" and I think it's going to do great on my Laser. You might ask some of the guys that already have the plane and see if the plane came out tail or nose heavy. If it came out tail heavy then the OS 120AX might be the ticket with the little extra weight to help on the CG.
ORIGINAL: OverTheEdge
I don't have a 90fx on it right now... i'm thinking of getting either the 90fx with a pitts muffler or the new 120ax.