Richer sounds are doing a Sherwood DD and DTS amp (6090) including RDS EON tuner for £200 (i have one and it`s not bad - it also switches composite video) i have added Mission M72 fronts, M71 rears plus the mission M7C centre speaker (£360) but you can get an impressive eltax 6 speaker system from richer sounds for around the £200 mark.
http://www.richersounds.co.uk
Cheers