Summary: I bought 6 of these for an Antec Eleven Hundred build. With the power adaptor installed these fans are much quieter than the supplied Antec fans. The included hardware for mounting takes vibration noise out of the equation by isolating the fan from contact with the case.
Pros: Low noise adaptor, Rubber fan mounting system, 400 mm cable
Summary: Good hold over till Scythe Gentle Typhoons are in. I just got mine, they are very comparable in every way except a little quieter. For under 5 a piece though, these are an unmatched value for a radiator. My 2600K is 5GHz+ with these.
Pros: Moves a lot of air, Quiet, even will 6 fans in push/pull, High static pressure, Open ends for easy install onto a radiator, Cheap when on sale, under 5 bucks
Cons: No molex adapters, Cables unsleeved, not a big deal
Summary: I bought two of these to use in push-pull on an H50 and have been impressed thus far. They are fairly quiet to me as I've been gaming on a tablet with the fan that is rather loud. I decided on these as they did well in a web-review in regards to use on a radiator. For the price, I would buy these again.
Pros: - Come with Rubber mounts, - Price, - Price/performance
Cons: - No screws (for example if you wanted to use these on a radiator), - Sleeve bearing
Summary: I've been using Zalman fans on my machines for 7+ years and never had a reason to complain.. in fact I have two 80mm fans on an old server that are still going strong and silent after 7 years. I would make sure to pricematch these but either way I highly recommend them. Without the included resistor to slow them down they are still very quiet and with it they still push a good amount of air.