I went through the same "thought process" many years ago with glow engines & recently with gassers, save $$ or just buy the best. After saving $$ with some glow engines, I had many new problems with transition issues & reliability. I remembered that experience when looking for a good 50cc gasser, I went with DA. Figured I'd at least wait & see how long the DL's last, even if they run good now, will they hold up 1year,2 years or longer? To some extent, it depends on how you fly, if your going to huck it DOD, why risk it with an unknown?