increase 700 bucks get the sedion its good but if you can find go for noctua nh d14
sedion?
D14 is well....not avaliable....best bet would be A70 or H60.
CM Seidon is a one hell of a cooler and can match up even a H100 - well, read just one review on a foreign tech mag so this info may need editing.
you can have a look at the assassin its got some hefty reviews though i personally don't recommend deep cool at all just because of the noise levels....noctua works without any sound at all sometimes you check to see whether its working or not....h60 if it 4k the go for it but h60i would be i guess a little more and is better in terms of performance
assassin which 1? that 1 which cost about 5k?
i am getting a used silver arrow for 2.8k and a rma sealed corsair h60 for 3.3k ..seidon is above my budget..vedant quoted 4.5k for seidon
I am not too sure about used coolers unless the item is in a very good condition and/or is a very good cooler.
A few options in no particular order.
Thermalright Ultra 120 Extreme. Add 1-2 CM 90cfm fans.
Thermalright Venomous-X. Add 1-2 CM 90cfm fans.
Corsair A70.
CM Hyper 212 Evo. Optional: Add 1 CM 90cfm fan.