Thanks for the suggestions. It would seem the GS-D3s have left a bit of a hole in the market.
They're only going on my Wife's 206 GTI, so the Michelin PS3s are a little more than I was hoping to spend (the last Goodyear's i bought were ~£90 from what i remember)
PS3s are on camskill for around £100 each, so you can probably get them fitted for that price. So a tenner more, £40 a set, over the life of the tyres, is that really that much extra?