I've just bought a pair of presonus eris 3.5 for £85.
Althought the bass end only goes down to 80Hz, in the small space that I have, only 900mm triangle between my head and the speakers. I'm pretty blown away by the quality for the price.
If my wife would let me have the whole living room instead of just a corner, I would have saved my pennies and gone for the 5" or 8".