As to what rod to get, it depends on the type of action you like. If you are partial to fast action single hand rods and are committed to Sage as the rod of choice, I'd recommend you look at the European action. However, if you like slow rods, the Traditional Sages would be ideal. There is a very noticeable difference between the Euro's and Traditionals.
One of the best things you could do is find some local folks, or a local shop that has 2-hand rods and cast several different rods from different rod makers. Also, keep in mind that as people improve the spey casting technique and gain experience spey casting, they tend to move away from slow rods and to more medium or fast rods.
There are many fine 2-hand rods out there other than Sage, and all of the rod makers have a different feel to their rods. You really ought to try several rods from different manufacturers before deciding.