The DA 100... if you want maximum performance, the DA is one. If you want the very best in materials and workmanship (and workmanship is an understatement...more like artwork), the DA is the one. If you want smooth reliable power that puts it's torque out down low to turn those huge props, the DA is the one. If you want to do buisness and get service from the man who wrote the book on it Dave Johnson is the one. The DA has OBSCENE power! On KS cans it's even stronger. The engine has an IGN that is the best I have ever seen...even guys running 3w's are running DA IGN's! hehehe The engine is smooth and the throttle transition is so linear and quick that the first time you run it up, you'll wonder if it's gonna pull the dang firewall off. hehe DA's are like no other engine...they are in a class by themselves, and when I ran mine for the first time, I realized why...they only do things one way at DA...the RIGHT way. The DA engines are not just great ones...they are perfection in every way. I can say without a doubt, that if you decide to purchase one, that it will be the best buy you ever made. That may sound like a commercial, but it's the truth. I speak from personal experience here, and have had many dealings with DA and talked with them at legnth on things, and I have never been more statisfied...those guys there have real class, and they have treated me like I was their number one customer...I've heard others say that as well. I have seen the DA on a Cap and talked with the guy that owns it in the Chat and he says it's the awesome combo. If you would like to see the 100, go here http://www.desertaircraft.com/da100.html.