---

I have a 2004 with a Merc 90 2 stroke that I bought a few months ago. The motor still runs pretty good but it has seen its days. I want to repower with a 90 Yamaha 4-stroke or possibly a 115.
Here's my dilemma, the cost to do this is going to be over $10k with new controls and what not. The boat is otherwise in good shape. There are a couple of hairline cracks on the gunwale port side about 3 inches long, but nothing anywhere else. The steering wheel and steering in general could use some help too. Otherwise a good detailing should make it look almost new.
Anyway, I am weighing just selling the boat outright and buying brand new. not necessarily a whaler but something in the $25k or under range.
First off, is it worth investing into the repower and other minor fixes? I know this is subjective, but what I mean is can I expect a solid 5-10 years more out of this without worrying about other major problems? Is there anything that I should look for or be concerned with? My gut tells me to keep this and I do like the boat, but I want to make a sound informed decision.
The idea of having a brand new Scout 175 Sportfish, or similar sounds enticing. I don't have tons of time or money to keep wrenching on an older boat, so new is appealing.

And finally if I do repower with a 4 stroke, will the added 50 lbs or so be a problem? Will it still perform well with a 90 or should I go to 115? Does adding this weight pose any other issues?
Thanks,