The T and M were both emissions-spec cams, and are limp as hell. It's not just about duration (i.e. powerband position)...the lift is also very low, compromising torque. An 'A' grind is a slightly more relaxed cam RPM-wise without sacrificing too much lift.
My B200 with a K cam dyno'd 95% of peak torque at 2250rpm, so they're not that wild. A V is 90% of the way there, and far, far more common. It's not really worth waiting months for a K over a V...if you want a significant upgrade, you're better off talking to people like FolkRaceShop.
None of the factory choices are that radical, and they'll all pull tree-stumps out from tickover compared with something like a Honda VTEC engine. Personally, I'd choose an A or V...whatever I can get my hands on cheaply.
After that mini-rant, I can probably get a T cam (if those who have already volunteered can't) if you insist on a life of cam-related misery
cheers
James