I usually use Vishay MRS25's which was actually the problem. Thing is they've got very expensive suddenly (£0.08-£0.12 each) so I switched to Royal Ohm imports from Thailand (£0.008 each) as most of my requirements are pretty modest with respect to power. I've now got an influx of 0.25W ones which are the same size. The Royal Ohm ones are really nice, with decent tempco and nice thick legs. But only if you don't smoke 'em