I'm not a prop expert, but I do love my Hartzell BA prop. Very smooth, great climb (over 1800 FPM at gross), great cruise (204+ mph at 2400 FT, 8000 msl), my balance worked out very well on a 7A with 0-360 A1A and a completed weight of 1117 lbs with full steam gyro panel, paint and upholstery.
Not sure if thereis a new brand of MT prop out there or not but the biggest argument against the MT was that it was significantly slower and more expensive than the Hartzell.