I plan to purchase a 2017 520 or 521. I spent two hours today with a tape measure on the two boats. The front deck configuration is completely different on the two boat. I'm at the coin flip stage. I normally fish 4-5 times a week at southern lakes such as Guntersville, Pickwick, Wheeler, etc... Half the time, two people are fishing and the other half we have three people fishing. I'm 6'5" and my son is 6'6". I don't tournament fish. I normally put in close to the fishing area. No long runs. If it's windy or rough, I stay home. Any advice?