X3 for the etec.
I had a 75, not a lot of hours as we decided we needed a bigger boat right away, but that motor was fantastic.
I have an aquaintance that owns a fleet of houseboats, several hundred actually, and half of them have etecs. I asked if the have any trouble wit them and he said he didn't even know what was on them, if there was a problem he would have heard something.
I have another aquaintance that works on outboards for a living and he, like a lot in the biz, if they aren't prejudiced from the ficht disaster, swear by them.
They would be on my short-list for a repower for sure. Or a Suzuki. I think both are tops.
In your case, with an older boat, I would be looking for someone's HPDI take-off. You should be able to repower for half, and your controls should work with the same brand. The HPDI's are pretty quiet, better on fuel, and have a bulletproof reputation. For a single, either right or left hand will work, so it opens up alternatives for you.
EDIT: Here's one of those take-offs on ebay right now, 200 or so hours, crated and ready to ship. Bidding is at $1525 right now. I'd go about $6500 on it:
http://cgi.ebay.com/ebaymotors/2000-Yam ... enameZWDVW
EDIT II: here's rebuild shop with a rebuilt 200 with full warranty, $5000:
http://nwfloridaoutboard.com/forsale.html