Look up reviews on the individual coolers, they will often compare them to similar products in the temperature tests.
If not, by looking at enough of them you can get a general idea where everything stacks up.
Best for the price, air cooling. A Coolermaster Hyper 212 EVO will perform just as well as a H60 for half the price. Or get a Noctua NH-D14, which will outperform a H100i for about $30 less.
Or spend a bit more money for an XSPC Raystorm kit, will leave a H100i in the dust for about $20 more.