Theta
My two cents may be of little value having not heard the specfic vienna speakers you now have, I have auditioned some of the Vienna line up in times past. However, I have heard the VSA VR4Sr's and I own the VSA VR4jr's. The VSA speakers are fantastic, there is truly music in those speakers. Paired with the quality Gryphon that you have, even if it is just for a change of pace, you could not go wrong, you will love the VS speakers. The only question may be do you really have to take the leap to the VSA SR's when the JR's may do very nicely indeed.
My two cents may be of little value having not heard the specfic vienna speakers you now have, I have auditioned some of the Vienna line up in times past. However, I have heard the VSA VR4Sr's and I own the VSA VR4jr's. The VSA speakers are fantastic, there is truly music in those speakers. Paired with the quality Gryphon that you have, even if it is just for a change of pace, you could not go wrong, you will love the VS speakers. The only question may be do you really have to take the leap to the VSA SR's when the JR's may do very nicely indeed.