panaflos are made by panasonic. they are pretty much universally regarded as best in terms of cooling/low noise level. i have some older sunon 80mm and they are kinda loud. if you get sunons make sure you get the newer quiet ones, i've heard they are pretty good. if you cant find a good deal on panaflos, the next to buy would be antec. go to the for sale forum and see if anyone has em for sale, or go to the cooling forum to ask where to get em.