I think you would be best off just upgrading the 100-> a 150, sense you mostly use your equptment for HT, and sense in movies 70% of the dialog comes from the center channel… also for the other reason the 50’s play to 22hz, and the cross over, for the ep350 is 40, so you don’t have any gaps in your sound stage.. I think going to 60’s will just make the volume go up, witch you say you don’t really need.. I think the only difference between the 50’s and 60’s is a bit more midbass… have you called axiom, to ask them? They are usually honest, and will actually tell you not to upgrade if you don’t really need to.. hope this helps.
