I have flown both alot. More in the 2 bladed than the 3. The difference in tas/performance is minimal. I found the 3 bladed ones go out of sync more than 2 bladed. It actually says in the flight manual that 3 bladed are about 5db louder than 2 bladed? Groundclearence is a big plus. But for the extra $$$ to change over to 3 bladed, I would say it would be a watse of time and cash. It does look cooler though!
DVDA