another thing in favor of the OS 25FX. If you have a problem in the pits, you got alot of guys next to you with spare parts they would in most cases be happy to lend or give you to get you back in the air. If you fly odd-ball engines, your on your own, cause nobody at the field will have any spare parts you may need...

To me the reliability of the OS 25FX's outweight any possible performance advantages of any other engine may have...