I also like the traditional Sages. While I don't have any experience with the 7136 (I do have one for sale in my experienced rod rack), I have fished a lot with the much maligned Sage 9140. This is a greenie and I can cast it better and farther then any rod I've ever fished, I think even better then my much beloved CND Expert 1409 which I really, really, really like. For me the line that makes both the 9140 and the Expert 1409 sing is a Delta 7/8. I am doing normal spey casting (or at least my "wham/bam" version of it) using mostly the Circle C and the Double Spey casts and flies up to 1/0 (mostly #2s). To me both of these 14' rods are a joy to cast and fish.
How you get the line out and fishing is personal preference so as long as it works and is easy no one should care but the caster. MSB