I have an 04 225 Evindrude DI (not etec). I have no complaints so far. I changed the plugs last year and still going this year. I was told there is not a huge difference between etec and the DI motor.
I did alot of checking before purchasing this boat/motor from a private sale. A couple dealers said that it would be a good motor and I would like it. So far so good!
I read the initial problems with the direct injected motors was the internal parts needed to be built to much tighter tolerances than the companies current tooling would allow. Supposedly once the assembly lines were re-tooled with new machines the issues with the direct injected motors were resolved. Whether that is true or not I have no idea, but it sounded logical.
Good luck I would have no problem buying another DI motor myself.