That's a wise move checking all the info before you buy... But, I've had the BME 50 and had some problems with it (ignition) to the point I changed to DA. I've never had problem one with my DA (with about 15 gallons through her) but I do know of friends that have (mainly ignition). What I can tell you though is I think the DA out performs the BME hands down. So, for whatever it's worth, I think it would be wise to go with the motor that give the best performance. If you have a problem with either engine, just beat the manufacturer up until you/they get it right.