I have approx 16 rods and 2 spey rods of many wgts. Regardless of the line rating on a given rod I go one line wgt heavier. I find the casting to be easier. Also rule of thumb is, leader length should be equal to rod length - 9ft rod, 9ft leader (this is the total length with the tippet included), dry fly fishing (9 ft rod) I enjoy fishing a 12 ft (ie tippet) leader. Tapered Leaders, save yourself money, they make tiny-tiny-tiny rings (I purchase silver rings from a guy in Berlin, Germany - 10 rings, 5 years ago and still have 5 or 6 left, they sell steel rings in the US and show them in some catalogs) . When you cut up all your tapered leader tippet, tie on the ring and just tie tippet (material) length as needed.
One tapered leader using the "ring" will last you all season and save alot of money.