Yamaha YSP-2700 Digital Sound Projector
I would suggest looking at a Yamaha RX-V683 (allows expansion to Dolby Atmos speakers) and the Monitor Audio Vector AV or MASS 5.1 speaker package as a starting point. You could opt a 5.1 only receiver but this will limit your future upgrade to support the additional speakers needed for the new sound formats like Dolby Atmos and DTS:X Most new AV receivers have network support for playing internet radio and streaming from a local PC and some also support multi-room audio, such as the Yamaha MusicCast system. Look for models with Apple AirPlay support if you have iPads and iPhones.
If you are serious about your music then looking for a package such as the Monitor Audio Bronze range, although a serious investment, will repay you with wonderful sound. The Bronze AV 6 package is a good choice and can be found at a good price when bundled with an AV receiver. For example, the Yamaha RX-A1060 AV Receiver with Monitor Audio Bronze 6 Floor-standing 5.1 Speaker Package can be found for under £2,000.
Monitor Audio Bronze speaker range
Lifestyle speakers are not always considered to be the best sounding, as often their style and size will mean absolute sound quality is reduced. However, speakers such as the Monitor Audio MASS or the even better Radius series speakers are really quite good for most small size UK rooms. The Radius R270 floor standing speakers do deliver a sound well above their size and if finances allow can be paired with a subwoofer from higher up the Monitor Audio range to good effect.
Monitor Audio MASS 5.1 with optional stands (or they can be wall mounted)
When purchasing Hi-Fi and other audio equipment having a listen is very important, so where possible always get a demonstration of anything you intend to purchase, especially speakers. I always try to buy from a local retailer, as often they will provide better service and sometimes match internet prices; just ask! If not then Richersounds can be found in most towns and cities and can provide demos. For online look at Peter Tyson and Sevenoaks but as always Google is your friend when trying to locate the best prices.