P2 vs P4 Opinions and Thoughts

After (5) PIIs, I am looking at an opportunity to own a PIV. Has anyone made this change? If so, what are your thoughts, good or bad?For those with PIVs, can you tell me what you like about the PIV, speed, mid-range and top-end, fuel economy, ride, fishability, etc. or would the recommendation be to stay with the PII? Thanks for any and all opinions......Gerard