Yeah I think low 50's would make me happy, if not terrified. Never been that fast in a boat before. However 55 would be nice so I could beat some cars on the highways along the coast. I was just trying to get the most potential out of what I have and not waste power on torque and acceleration figures, when it's not what I really need. I will try to upload some pictures, it's in mid painting sort of. I finished but then there were micro scratches everywhere from wet-sanding and and I dont want to wet-sand more and wear through. Going to do a few more coats with a slightly darker red (Regal Red) and thin as much as I can. Then put it all back together. Will update then too. I attached a photo I don't know if it worked.
A few tips from someone who has had his CVX16 a while. In my hull's first few months with me upper 40's was about it and in a way that was good. There is a HUGE difference between running mid to upper 40's in this hull and running mid 50's. A lot of learning how to drive fast needs to sink in before you get a serious crack at dangerous speeds. And I mean dangerous. Stuff goes south quick the faster you go and our bodies aren't designed for water contact at the velocity you are looking at. In my opinion get used to your hull in the conditions you plan on using it in before you attempt to see how fast you can go.
My CVX16 with a 100HP Johnson hit 56.0 at it's fastest before I hurt the motor. (by the way I'll have $2000 in that "new" motor next time I buy something for the rebuild) For the best control at any speed and especially at anything above 48 the motor needs to be high. A lot higher than you would think is good enough. Speed comes from less resistance in the water. Mine started too deep and even with my 6" setback jack-plate I have yet to get it so high that I loose water pressure. A good friend of mine has a 150HP Evinrude eTec on his CVX16 and spinning a 14.5x24 OMC Raker and up about mid way on a 4" setback jack-plate we saw a very controlled 62MPH with a fair amount left in it. Using more prop pitch actually was less stable. No jack plate and at 1 hole up on the transom even braking 60 was a problem. If that isn't evidence that a low mounted motor can't get this hull to break 60 I don't what is. I am still convinced I could drive his boat to the upper 60's with ease and safely.
Now onto making your hull look good. Wet sanding mine and using very good buffing and wax products helped bring mine back close to looking new.
Finally boating is what is is all about. Having the boat is the thing. What it looks like and how fast it can go is really secondary. Be safe and have fun.