Some months ago I built my new silent rig... which is currently not silent at all! I wanted to swap the awful stock cooler for something more quiet and effective. In the first place I have taken into account the possibility to mount the old cooler, a Thermaltake Sonic Tower, which is not well regarded here in SPCR forum, but I found it to be not so bad for my old downvolted Sempron. Now that I have switched to a i5-3570K there's no way to adapt the mounting attachment and moreover I guess the power would be beyond the dissipation capabilities of the Sonic Tower. So I am evaluating which is the way to go while keeping both costs and noise low. The case is an Antec P183 V3, so I guess there's enough room in it to fit whatever the cooler I would end with.
Please take into account that I live in Europe, thus the price of the heat sinks should be different with respect to what you can find somewhere else. I am currently considering these options:
Cooler Master Hyper 412S (~34€)
Cooler Master Hyper 212EVO (~39€)
Prolimatech Panther (~44€)
Thermalright True Spirit 120M (~45€)
Scythe Mugen 3 Rev.B (~47€)
Thermalright True Spirit 140 (~50€) <-- no enough clearance inside casing
Cooler Master Hyper 612S (~50€)
Scythe Ninja 3 Rev.B (~51€)
I will be very glad to add something else to the list and I look forward to any suggestion that would help to make up my mind.
I wouldn't go too much beyond 50€ (65USD, nowadays), so I have already dropped some other options like the Thermalright HR-02 Macho (~62€) and the Noctua NH-U12P SE2 (~60€). I think top-down solutions wouldn't be the way, for the P183 top and back fans next to the heat sink would ruin the air flow.
EDIT: Cooler Master Hyper 212EVO, 412S, & 612S and Thermalright TRUE Spirit 120 & 140 added, thanks to kuzzia and CA_Steve for the suggestions. Prices are referred to Amazon.it/Ebay.it and take into account shipment costs when required.
EDIT: Scythe Mugen 3 rev.B added, thanks to kuzzia for the suggestion. Price is referred to Amazon.it.