if everything is going to work out as I plan then soonner or later I'll be buying equipment for about GBP5000 myself. firstly I must shift my current set up.
I'll be going for a pair of opalum flow.4810 speaker system (those are the more rectangular, white ones on the picture below).
I say speaker system because they comprise of a pair of very thin digital active speakers and a control unit (hub) which role is to send digital signal into the speakers along with power to feed the amps inside the speakers. (you can think of this arrangement as in case of USB powered headphone amp which receives power and signal via USB). that means you don't need to worry about thick power cords hanging off the wall and you don't need to worry about speaker cable as well since the speaker receives digital signal. supplied thin wires are all you need. no esoterica nescessary. the hub also has gain control which can be used as volume control if you have no other choice.
the source will ba a windows based ultrabook or tablet running jPlay paired with this creation:
http://www.audiofly.eu/collections/revel-komplettsysteme/products/revel-d-starter-set
the sender together with the receiver could be called a wireless sound card because it plays every sound your computer plays. unlike a streamer which only plays music files. this makes this device much more useful and flexible than a streamer IMO. for instance you could watch a movie too. and by using a digital out into hub's digital in means you can keep the signal in digital domain for as long as it's possible (AFAIK in those speakers drivers' voice coils act as passive filters for the PWM signal effectively rendering them DACs).
optionally you could add a subwoofer because integration will not cause a problem. the hub has a sub-out with signal sensing. if a sub is connected then the hub establishes a digital crossover @ 80Hz in which case the flow speakers receive all signal sans deep bass which is routed to the subwoofer. just like in HT set-up. clever and that's who those things should be dealt with.
EDIT: I forgot to mention one think which is super important to me ATM as far as hi-fi goes as I'm not into hi-fi showcasing anymore. the hub and the dac are very small thus very easy to tuck away out off sight. you're then only left with flows. but IMO they wouldn't make any room more ugly. quite the contrary actually.