These shades have the 3/4" pleat. On 6' x 3' windows I would say that you could go with either the 3/4" or 1 1/4", depending on preference. I personally really like the larger pleat size, it's a more simple, classic look. I think either one would work quite well. The top-down/bottom-up upgrade is actually currently offered as a FREE promotion. Let me know if I can assist you with anything.
Distinct Interiors