Lionheart360 :
When my build is complete, I would like to overclock my i7-4770k to somewhere around 4.5ghz. To do this safely, I know I need to have a pretty good CPU cooler. Any suggestions on which cpu cooler I should get? Also, I would like to keep the price around $50.
good luck. as i'm sure dozens of others will tell you, overclocking is not a guarantee, it's a lottery. some cpus overclock well, others do not. When talking about haswell cpus, the average overclock seems to be right around 4.3ghz (and yes, there are some that won't even get past the haswell turbo speed of 4.0ghz). So while an expensive cpu cooler may help you reach your goal of 4.5ghz, understand it will largely be up to the luck of the draw.
as to your question, THG reviewed haswell cooling solutions under overclock situations. it turned out that high end solutions are almost a requirement as most midranged cooling solutions proved inadequate. That leaves you with the NH-D14, as the best air cooling option, while the corsair h80i or h100i are your top of the line water cooling options.