Hi On-the-hook, Welcome to ClassicParker!... To answer your question, in short, we have a 2013-2014 2520 XLD with a 2014 Yamaha 300. It is perfect for us and how we use the boat, and I too like the simplicity of a single.... But, you asked a question about the 2520 XLD that will bring you a wide variety of answers. A lot of ClassicParker folks will say, 'you can't have too much power'. If you agree, go with twin 200's or max out the rating of the 2520 XLD and go with twin 250's. Some will say twin 150's are what they want, and some will say go with the single 300 Yamaha or Suzuki.... My 2-cents. If you want to buy and maintain twins, then I'd agree with the twin 200's. (are twin 250's are overkill?). Our 2520 XLD with the 2014 Yamaha 300, pops up on plane quickly, tops out at 44 mph, cruises best around 30-32 mph getting 2.0 to 2.2 mpg at 4200-4300 rpm. For our use it is perfect.... If I had twin 200's I would like the ability to cruise at 3500-3800 rpm instead of the 4200-4300 that I cruise at with the 300 Yamaha, but for me I have always been a fan of maintaining a single engine, and although I have run countless boats with twins, I have only owned singles, and prefer to maintain a single. Good luck with your search for a 2520 XLD and, again, Welcome to CP....I am searching for my first Parker and wanted to learn if a single engine is enough power on that boat. I like the simplicity aspect.