And what about an MVVS .25 Combat? This engine was designed for combat (The one in my avatar) Just ordered one..didn't let it run yet...but heard great stories about them I'm quite fond of Irvine too, but when i look at the specs, the Irvine .25 seems to be less powerful than most other .25 engines. The MVVS .26 also could be an option.. It's a little cheaper and weights a little less than the .25 Combat (due to the large head it's a bit more heavy).