I am considering purchasing a new 320 SY. Does anyone have an opinion on engine selection? I like the twin 350 MAG's as they get great reviews and mechanics, etc. in my area say they are bulletproof. The other option is twin 377 mags which are a little more horsepower. I would like to stay with Mercury over Volvo. I have a 2012 280 SCR and it has the 8.2 380 HP Merc and thats a real winner of an engine - boats just too small for our family. . Any opinions or other info is greatly appreciated.