Have you considered Yamaha any? Lightest 25hp on the market. Inexpensive too, in comparison to some of the others. Sure do like mine.
If there's one thing I like about the Merc, it's that it's a 3 cylinder (same as Tohatsu since TOhatsu makes it). The suzuki is also 3 cylinder, and a little lighter than the Merc. Finally got a chance to run a Suzuki DF25AES2 and though it was smooth running, and pretty quiet, it was noisier than my little twin cylinder Yamaha, and honestly, for what it costs, I wasn't that impressed with it.
The Merc 25ELH MSRP is $4700 and change.
Suzuki 25 is about $4900.
ETEC 25 is about $5200-which I dont' care about because I don't care for the heavy, expensive 2 stroke-even if it is a good motor.
Yamaha-I bought mine (short shaft electric start tiller manual tilt since it's a LOT lighter than my old one), $3699 out the door. I think MSRP is higher online, got mine locally, price was a lot lower than any online retailer-and I didn't get anything "off" of it being that I work at a dealer. They make like $20 on a loose outboard (not included into a boat/trailer package), so the price is the same for everyone. Came with high quality fuel line, but no tank...they'll include a tank but I just re-used mine and saved them a little $$$.
Watch the online retailers. I had a buddy who bought a Tohatsu 25hp in 2010, bought it on ebay because of the much lower price than anyone local. Well it was lower for a reason. Generic listing. Was supposed to be an electric start, got it and we went to hang it on his transom and realized that it was a manual start only. Had to pay to send it back of course (truck freight due to the size/weight), finally got them to own up to the misleading listing, they sent the correct one-ended up costing him more than buying it locally, lost half of the fishing season waiting around and fighting with the seller. It was a good motor, a little crude, but it did what we asked it to do, other than a lack of power trim (listing said power trim & tilt-when in fact it was not trim, just tilt...meaning it could not be trimmed while underway). That particulary upset me in that I'm used to having trim to change the boat's attitude in relation to a load change. In other words, it was "cheaper" for a reason.