Always determine the mission prior to selecting an aircraft. Useful load, typical flight profile, altitude requirements, etc... Then, select an aircraft that will satisfy 85-95% of your missions very well. You have to determine the problem before applying a solution. I fly a Navajo 325 CR with 350 h.p. Panther conversion. Great plane. Relatively fast. Narrow cg envelope and sucking on O2 if you have to go high. Great in the southeast within about 600 n.m. from home. Not so much if you have to fly high and go much further.