I got to tell you I had the same delema over the various engines. Everyone will tell you that BME,3-w and the DA are all great engines. We have three 33% 540t's at our field that have the 3 diferent setups. The 3w is the most powerful and can do more 3d than the other 2. If you want unlimited vertical snaps than go for the 3w. I wnt with the BME for a few reasons. The primary reason is that the engine is built in the US and Keith Baker will help you with any problem. I wanted reliability and ease of use and the BME started and idled right out of the box with 4 flips of the prop.