Irv
I assume a little more hp would give better performance in adverse conditions. I chose the 5 hp because I wanted to be able to use more gas at one time than the 1/3 gallon internal tank of the 4. As for the Honda, I just couldn't justify the extra cost. My family car is a Chevy not a Cadillac, and that has worked out fine. Time will tell with the Nissan.
Jerry