Hi im looking to find the right prop for my bass boat, its a 1987 drifter 21' 1'' and I have a 2000 mercury 200L EFI that I just bought, right now it has a 4 blade prop but my tac goes to 6000 rpm and it buries it and all I do is fish by myself and sometimes with a partner. And I do want the best speed I can get with out having to many rpm. so any info would be appreciated. thanks