Hey Russ, I have a 1990 300ce, with the M104, I love it!
Yes, the torque curve is not the same but, still pulls strong to 7000 rmp .
Remember these 3.0 M104's start in second gear thats why they seem sluggish, but Power Brake one just a little and nail the throttle, it will smoke the tires! Sometimes when I hammer it down into first gear, hit 7000, the tires chirp going into second.
My car has 130,000 and still drives like new. From what I have learned from this forum and my Tech, the 3.0 is GOOD, less to go wrong.
It's all good!
Russ, thanks for the tip's on the digital camera, I think I am getting the hang of it.