It is hard to find Scientific data on a particular engines output without an accurate measure of torque and rpm. The typical modelers method ranges from inaccurate to subjective. The only engines on your list that I would avoid are any single over 80cc for vibration, the small 3W and cheap engines in general for their excessive weight. All of the now less popular Sachs based engines such as Brison, Fox, and Taurus are still very good performers, and have more accessible carbs. For extreme value there is no beating that ebay G62. Good luck!