Wow, that looks almost exactly like the layout of the boat I remodeled this summer. I can say from experience, that it's a great layout. Here is a pic of mid-build. Mine doesn't have the flip up seat/platform in the back, though:
I disagree with the comments above- the seating across the back is the best seat in the house. You get the least bouncing, can stretch your legs and if your motor isn't loud, sound is not really an issue.
Evinrude didn't go belly-up, Bombardier just stopped producing new motors. Dealers still service them and cover the warranty but you really NEED to have a dealer near you, or it will be a serious chore if you ever need anything.
I have several Etec motors, and they are outstanding. Very strong for their HP rating. Will drag most 4-strokes around backwards, as you can see in the YouTube videos. Almost maintenance free. Long service intervals.
But that being said, because they aren't in current production, I would think VERY long and hard about spending $20k on a used boat with one on the back, especially if you could find something similar with a newer 4-stroke.
I find Etecs around at a reduced price and am super happy running them! But not at full price...
That's just my reasoning, though.