I had a 15 ft grizzly that I originally bought with a 4 stroke 20/25 merc and thought it was a dog. I upgraded to a 30/40 Yamaha and had a center console added. It was fast, but was heavy and drafted about 10 inches, which doesn't do me any good fishing where I wanted to.
I'm now running a riveted 1448 with a 2 stroke 20/25 merc tiller and couldn't be happier. I've used this rig more in the last two months then I did the other boat the last 8 years. I only run the river during the summer when the water and flow are low, so I think this is the perfect rig. It drafts about 4 inches with all of my gear and my 4 year old and runs about 20 mph.