Crucial M4 128GB £150 http://www.ebuyer.com/266526-crucial-128gb-2-5-m4-ssd-s...
HDD prices are very high atm so avoid buying one if you can until they go down again. If you do really need more than 128GB of storage then I think you'll have to sacrifice the SSD.
I have not checked but I think the issue with Sandforce drives (Corsair Force 3 series and OCZ Vertex 3, Agility 3 series) has been sorted out, if so (you might want to check or wait for assurances from someone else) then those drives are slightly cheaper.
Case, if you see one you like then obviously get that.