I would go etec if you want 2 stroke (quick,quiet,good on gas & oil, light weight compared to 4 strokes)
If you want 4 stroke I would go with the best deal ($) you can get, best warranty and who will service in your area.
I had both 200 & 250 hp Yamaha 4 strokes.
Both great engines. Downside of Yamaha if you ask me they need higher octane gas.
I have plenty of friends with Suzuki 4 strokes and they are every bit as good as the Yamaha and you can run them on 87 octane.