The Matrix works for me in stiff, but its a bit on the loose side with a 4.0tq rating. The legit HD6 or HD7 is a 90 dollar upgrade when ordering I believe and the Tour AD's were 150.I'm suprised the MAtrix wasn't stiff enough for you. You must make a pretty strong turn on the ball.
This club is almost a lock to be in my bag soon, but the XL Custom will get one more chance to win me over. If I go with the XCG6 I will probably custom order a HD7 in Stiff if I can get one....I believe they are discontinued.