I bought one of the Niki748 ones on ebay and I am well pleased with it. The slipper action is superb (although I guess this is as much the adjustment as the quality of the clutch), and the quality is top notch. Not particularly bling though, as the pressure plate is kind of magnesium coloured rather than day-glow, glitter-enhanced red or similar.
He hasn't got any up on ebay at the moment, but here's a link to the last one he sold
http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=8017397 791 Looks like £500 is the going rate for them now (I got mine for £450
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For this you probably get a clutch that would be £800 - £1000 new, only downside is that there is some wear on plates and clutch basket but, to be fair, on mine wear was minimal....good bargain I reckon.