I say go for it!I have been sailing my 16 solo for about 1 year and now it is what I prefer. It can get a little crazy some times, but I think that is why you want to go to a catamarin with your weight I would recomend buying a righting bag to help you right the boat. But that is it. Just rember you are the one in controll, you don't have to raise the main all the way you don't have to go out with the jib. take it easy at first but you will be amazed at how fast you and the boat will become friends and you won't want to sail a mono hull again.