The Only engine for me is the OS .25 FX I have about 6 of them and they all run great. Straight from the box they run as hard as anything. Slap on a Ultrathrust muffler or Kentucky mousse can and you are right there running with the big dogs. Norvels SUCK! Well for me I won't use them. They lack reliablity. They are however the lightest most powerful engine in the .25 class. If you stay with them and learn how to make them work you can make enormous power with a Norvel. With this being said everytime you think you have them figured out one will $h!t on you just when start engines is called. That's why I fly old reliable OS .25's I haven't missed a start all season that I can recall. They just work everytime. Wait a minute you live in MO???? I might be flying against you next season........Norvels rock you should buy 10 If you were unwise and chose a Norvel don't waste your money on the bearing engine the bushed engine actually make the same power and has a better carb. Much cheaper to boot. The Irvine engine has equal power to the OS and is a great engine. Neal at www.waverc.com has both Norvels and Irvines as cheap as anyone. Last time I checked his Irvine .25 was about $85.00 actually cheaper than an OS. If you need and airframe checkout www.teamseaholm.com The Avenger is the only airframe in the country that has consistantly kicked my butt. I finished 3rd Nationally this year in points and Eric Wenger and AJ Seaholm consistantly handed me a whooping flying Avengers. I might have to adhere to the old addage next year (If you can't beat em join em) Hope this helps!!! What ever you decide I hope to see you at the flightline next year with a streamer on and having the time of your life. Nothing compares to the rush of combat..........Nothing. Plus you will meet the greatest folks in all of RC flying Combat. Good Luck.