I get confused with the speed of these! the philips one's are meant to be fast 150ns, the one's below are 650ns so much slower than the philips?
http://www.ebay.co.uk/itm/131333090510?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.co.uk/itm/131333090510?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT