Get a seat slider from Polaris. It sits about 3 inches higher than the stock mounts but makes a world of difference if you need additional leg room. I am 6'6" and my wife is 5'3" so no more switching seats every time she wants to drive. Just lift up on the bar and slide the seat forwards or backwards. They are around $60 so give one a try before spending $600 to $800 on aftermarket seats that really wont get you any more leg room.
Lynn