I repowered my 86' Overnighter with a 225 E-Tec last season and LOVE IT! The motor is a beast, quiet, clean, powerful. They are a bit pricey, but definitely worth it IMHO, as there is 0 maintenance for the first three years, no pricey oil changes, etc. If you have it programmed to burn the XD100, it sips oil so sparingly that I sometimes wonder if it is actually burning any.
Just my $.02
Bren