The real determination as to what planes have advantages, and therefore, which planes should be perk planes, has to come from the community who fly these planes day in and day out. I suggest a rolling Poll taken from Votes from the community as to which planes should be perked. Members can vote each month and based on 3-6 months information, the perked planes can be changed every 3 or 6 months based on the votes. Each member would get x number of planes to vote to be perked and only one set of 10 voted on each month. Based on simple statistics, average, median and std deviation, HTC could then change perk planes.
Just a thought.
JB22