No substitute for cubic inches. That being said, if you want the most power go with the ZDZ 160 on the above mentioned engines. You want stupid stupid stupid power try going higher Well maybe not.

My personal choice (as Ralph has mentioned) the BME 110, if you can set it up without adding additional weight you should be at or about 26-27lbs and that is doable on a lot of airframes.

Believe me, lighter planes will fly better and will get you out of trouble easier. I am living proof, since my pilotage skills are not super. A heavy over powered plane is pretty much useless, unless you like flying straight. Start banging the stick and watch how it will bite you, snapping and breaking out of maneuvers every where.