Aftermarket cooler needed for i7 2600?

The stock cooler will provide minimal cooling and keep the cooler within heat spec, while doing so loudly.

You can pick up a Coolermaster Hyper 212 plus for around USD $25 with a quieter fan and more effective cooling. It is a great cooler for the money. It does a better job with its single fan than my H50 with 2 aftermarket fans in push/pull (total cost of near $100).

where can I get that deal? I checked newegg.com and they have it for $49.99.

You live by a microcenter by chance?:

http://www.microcenter.com/single_product_results.phtml...

They're currently $29.99 there. I got mine when they were marked down to $24.99 with a $10 rebate ($14.99).

The stock cooler should be fine. I wouldn't bother installing an aftermarket cooler until you at least try out the standard cooler to determine of the temps are too high or the fan is too loud.

obviously

Depends on what you plan to do with if, if your going to do heavy gaming or folding at home you will want to go with a better cooler, if it is just a basic computer for you the stock cooler will be more then enough in a well vented case.

Are they refurbished, used, or new?

If you were you asking me, they're new (NIB).