I have an 150 horse 06 Opti and I love it. Never ran an Etech so comparison from me would not be fair, but it uses the least amount of fuel that I have seen from an outboard bigger than 125hp. I ran it for a week at cumberland during a rented house boat trip and I did not run it out of fuel. That includes several trips back to the state dock from Otter Creek, running while fishing, and tubing and pleasure boating with the family. I ran it hard all week and it used very little. It is quiet enough to carry on a conversation with the person next to you without having to talk much louder than normal. All and all I rate it a 10 out of 10 compaired to the next best thing I had. 01 xr6 150. I would go with the opti again and not even ask a question about it. Just my 2 cents though.

bP