I read as much as I can find on that size outboard(25-40hp).I think microskiff had a 25hp shootout but it doesn't have the etec because it is a 2 stroke.
I'm not loyal to any brand really and I've only heard good things about the small 25-30hp etecs.
This is coming from duck hunters(forums) that are pretty loyal to mercury's,they say the new etec although being heavy for a 2 stroke,is a leader in that class,lots of displacement,can slow troll,pretty quite,clean and real good on gas.
If your thinking one of those older Sea Pro merc25hp(if you can get 1),there really light and old school,pretty reliable.
As far as smaller 4 strokes,30hp and below,havn't heard really bad things,except there kinda dogs.The 40hp mercs 4 stroke are nice outboards though.
Similar to Johnny,I'd buy one if I wasn't so tight
...I do look for used ones everyday though.