I would think that carpet would reduce the noise generated from rattles, gear, etc, and when running down the water. I would also think that the wind noise would drown out most rattles, etc. as well. I have carpet in my tracker PT175 and like it. I actually got to see a G3 with vinyl today at a dealership. Seems nice, but I do like carpet for some reason. I asked if the vinyl is any hotter out in the sun and the guy said that the hinges and seat plates get more heat, and vinyl is a little bit hotter. If I had to make a decision, don't know which way I would go either.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.