I would try a backrest to go along with the highway pegs. I agree the F6B is 'standard' seat and peg positions. For me its the most comfortable position for seating and pegs. I've had feet forward and slight rearward pegs on sportier bikes. My height is 5' 8" with a 30" inseam. Everyone's comfort and fit are different, you gotta find what fits you.
Good luck.