fish_fishburn,
I purchased new 30 hp Etec power tilt and trim last month from Hamilton's Bay city marine. Price was cheapest i was able to find in Ontario and guys did awesome job installing it. Installation was free of charge.
You can find all information about difference between 4 stroke and Etec. I took boat out last weekend and was amazed about that motor - quiet, powerful for my boat, economical - i am usually going from almost a tank of gas per trip, that time was barely 1/4 of it. Also - most important part for me was NO BREAK IN period. Computer is making it invisible for you by adding extra oil. 300 hours maintenance free or 3 years. I got 6 years warranty - but that was a promotion for March only.