I would go with either a Webra 50 or an Irvine 53 if you desire a two stroke or an YS .63 or Satio .72 if you want a fourstroke. Use a 12.25x3.75 APC with the two strokes and a 13x4W APC with the fourstrokes. The Webra 50GT and the YS .63 would be my first choice. Stay away from MDS. They seem to have alot of problems staying running. The Rossi .45 is powerful but quite heavy.