42 legacy and 37 stil are TOTALLY different boats. Different construction, different steps, different weight..completely different design. I own a 37 so my comments are not based on what my best guess is.

There is a local 37 with 502's and prochargers that flirts with 100.

Im gonna have to say based on that it would be north of 110

What drives are on the boat.

mine does 102-105mph on at 5800rpm running 30x17.5 5 blades.
1998 37 singles step, 850sc and #5's

The 2008 41 Super Leggera at LCM had staggered 700's and it ran 110.8 on the smartcraft. I was told the 41 has a similar bottom as the 37, just updated. I would think the 105-110mph range should be right on.

Is my info on the bottoms correct?

Your info is not correct. The 41 Super Leggera is a bottom that was developed a couple of years ago for the SV40 Race boats. It is not even close to the 37 bottom. Also the 41 weighs significantly less than the 37 did. That being said, the 37 were a great running boat. The 37 With 850's will flirt with 15 - 110 depending on prop or gear ratio.

The super leggera has five steps, unless its an updated quad step 37, most 37's are single steps... From what I know its a brand new design

How does the 41 ride in rough water. We looked at one at LCM Tuesday and just could not find any solid info on the hull. We measured the runing surface and it was 37ft, 41 with the bussle, so the info I heard that the bottoms were similiar made sense. I guess thats why im asking, thanks for the correct info!

Gary has owned 2 37's so I would think his opinion would be right on! I would say north of 100 but not by awhole lot

The 41 runs strong in rough water. Essentially the SL 41 is a stand up version of the SV40 Race boat. That bottom was tested in P1 racing in seas ranging from 2-3 ft chop to the race in Malta where the seas were 16'-20' +.