well thats a tough question and can be subjective at times. ae you talking about feel alone or ballflight? for me i cannot separate the two and at times one can influence the other. feelwise imho i would say the best feeling shaft for the type j would be the nspro 1150. i have at one point had the js shafted in 1150, 950 and Bg. the nspros feel the best but wasnt to happy about the ballflight. now the black golds are the perfect combination and compromise of both.
your opinion of the shafts i mentioned could be different though. now if they could make a shaft that could feel like the nspro 1150 yet had the ballflight of the BG that would be my ultimate shaft.