there are some cheap coolers like the deepcool lineup. i would suggest that you read some reviews. you can check deepcool lineup, then maybe select 2-3 based on price (that you're willing to spend) and/or looks. then google for some reviews.
don't worry, most coolers are compatible with different sockets like the current 1155 down to 775 holes. so it is worth the investment,
im using 620 of antec, for a while now if im not mistaken, cooling my 4ghz 2500k