I am currently building my 1st computer. i got the i5 3570k IV processor. i might consider OC in the future so i rather get/install aftermarket heatsink fan now before i put it in the case because from what i understand its a hassel to do it afterwards. i most likely will do minimal oc nothing extreme. the case i got is the corsair 300r. budget not higher than 50 bucks. which one would you recommend and if neither of those then which one should i go with.http://www.newegg.com/Product/Product.aspx?Item=N82E16835106150
Here is a link to a site where they compare coolers and such. Both of the models you asked about are on the chart on this page. As you can see the frio is better than the 212 however that comes with a larger price tag.
The testing was done on 775 socket cpu's but tho the temps may be different than listed they should still scale the same as far as best to worse.http://www.frostytech.com/articleview.cfm?articleid=2523&page=5