best surround kit for around £180 atm is the Tannoy fx5.1. Superb mids and treble. If you can upgrade the sub at a later date then it has the makings of an awesome little system. RRP is £480. British designed (Glasgow) but Chinese built like most things.
do a search on here- theres been a thread floating around.
I've heard those Pioneer '310s. Distinctly unimpressed i'm afraid.
No comment on the Celestions but they won't be made in Britain/Kent.