Glad to see some glow questions on the forums. This is pretty widely an electric pilot's paradise but there are some of us who still love the smell of methanol in the morning! I have found in that size the best engine all around from thrust to reliability would be a super tigre G45 they have the power of an evolution 60. They're much lighter and extremely quiet but loads of power. There is no place to buy them from a distributor as of now but you can find piles of them brand new on Ebay. I have personally purchased 6 new ones on Ebay with no problems. There are 2 versions, there is the Chinese version which you can pick up brand new for about 65 bucks or the more rare Italian version, which will run you about $110 brand new. I personally dont see too much of a difference. The quality of the casting on the Italian version is a little better, however the Italian version takes much more time to break in. They are both ABC so you dont have to baby them quite as much during break in as a ringed engine. But try to avoid full throttle for more than 10 seconds, and run it a little rich for the first 3 tanks.