According with RIO
's site http://www.rioproducts.com/skin/summ..._Line_Recs.pdf
, the range of your various rods depending on your expertise is (master-beginner) 385-450 for Beulah, 510-550 for your T&T, and 510-550 for Burky. Therefore, it would appear that your Beulah is light and your T&T is heavy: if this is correct and your are not an expert, yours casting should be better with the heavier T&T than the lighter Beulah and vice-versa if you are on the expert side.
As for the leader's lenght, 3-3.5 feet over an above the polyleader.... I like a 14 feet polyleader.