Desert Aircraft and Dave Johnson have not given me a single reason to look for another engine manufacturer. I've got the 100 and the 150 and I've heard good things about the 50. I'll be picking up another 150 shortly.
Cans... if you don't need them for your flying field... wait. You are not going to appreciably affect your IMAC score by not having cans. Don't worry about them for now, maybe in the future.
BME gave me a reason to look for another engine. I've heard the 3W distributor "main man" has a bad attitude.
Nah... for my money, until they give me a reason to go else where, it will be DA. Period.