Hello everyone. I found a really good deal on a 18 ft cheetah 180 with a 3.0 140 merc. I'm worried that it won't have enough speed for what I need. I'd probably have anywhere from 2-3adults on the boat and 1-2 on a tube or wakeboarding/skiing etc. Will it go about mid 40s or is that a dream? Would it even be able to do what I need? Thanks in advance