Moving on from Mu-so - newbie

I have been living with my Mu-so for six months now, and I've got some cash which will allow me to move on, and I am seeking advice.

I love the sound and ease-of-use of the Mu-so and would be quite happy to stay with it, but I miss the stereo image.  I generally listen to stuff from a NAS.

SO: what I am looking for is something that has the same 'sound', but a precise stereo image. I have a budget of about £6500.
Suggestions would be warmly appreciated: it might be worth adding that the listening room is small, so speakers will have to be placed very close to a wall, and we have a cat who is prone to scratching furnishing fabrics near the floor.

Mike