Welcome to WellcraftV20.com. Yes we are a loyal group. My own experience started in 1985, that is when I first noticed the V20s. They are a strong,dry, and sturdy ride. I did not buy in 85 but remembered the V20 and bought my 90V in 2004. I prefer an outboard namely an Evinrude E-tec. An outboard gives you more space inside. As for 0ne or two engines I'm a Great Lakes fisherman and really don't see the need for two but I do still carry a kicker for insurance. Offshore in the ocean I would think you'd want two but a lot of guys here fish offshore with only one but I believe they go out in a group of boats. The fiberglass liner is great for wash down after a day fishing. The 21 is basically the same hull only with the outboard mounted further away from the transom. I'm having a senior moment looking for the proper term. The V20 is a great boat. More knowledgeable guys will tell you more. Good Luck Billy Mac