+1.
i don't own one, but they are stunning displays.
Thirded. The Spectravision ones, in particular, are spectacular. I am planning on buying the 30" model in a couple of weeks. The panel is H-IPS. However, they don't have USB.
If you're prepared to consider a S-PVA panel, consider the Eizo SX3031W (which has two USB ports). I have a three year old S2110W, which is brilliant. It does have a cooling fan, though, which might be an issue if you're sensitive to noise.
Given that you're in the UK, smogsy, the following two suppliers might help (though they only deal in high-end stuff like NEC, Eizo and LaCie):
http://www.nativedigital.co.uk/shop/
http://shop.colourconfidence.com/section.php?xSec=10154