Hi, I have a Lowe 18HP Stinger, which is comparable to the Ranger with 115hp.
I also looked at the ranger, but got a good deal on the Lowe (used). One thing that I noted as I did the research about the boat ... I was told (and Gary can correct me if I am wrong) that the 115HP Mercury 2 Stroke is at least ~25lbs lighter than the 115hp Mercury 4 stroke. I would assume similar math applies to engines of other brands. I try to squeeze every mph out of my boat possible.
When reading through the reviews of the Ranger, one of the chief complaints was that it was slow for its size (approx. 45mph top end), whereas the Lowe was slightly above 50mph.
(I had Gary add a 6" Jack plate and now I'm pushing 60mph (no passengers, full of gas & tackle))
The other thing that sold me on mine (and I'm not trying to convince you to buy Lowe) was the amount of front deck space and how it tapers from bow to transom. Most aluminum boats look like a pizza slice, where mine looks more like a candy bar. Means good stability and you can run laps without anyone falling overboard ... just something to think about.
Good luck on your purchase!