Buying a barebones need help with Harddrive!

Ok I'm buying This barebones PC and i need to buy a hard drive..(this is my first time doing any of this) and i don't know what one to buy? there's IDE Hard Drives and Serial ATA Hard Drives but which one? do they all fit? I don't want to buy one that doesn't work with my PC! thanks

All modern mb's support SATA and this is a better faster technology. Read the spec's of your mb to see what connectors it has before you buy .

Right now I would NOT buy a seagate 7200.11 series hdd . They are very fast but far too many have problems . If you check the newegg user reviews for the 640 gig 7200.11 for the last two weeks 61% of reviewers said the drive was poor or very poor . Lots of them didnt run at all .

For performance the safe option is western digital BLACK series .

If the highest possible performance isnt an issue then WD blue , or Samsung F1 are a little slower and a fair bit cheaper.

Theres usually an advantage in 320/ 640/ 1 terabyte drives . These sizes tend to have platters [ discs ] of 335 gb . This is the most data anyone is fitting on a single disc which means its tightly packed and can be read faster
A 500 gb hdd will have two discs of 250 gb so not so densely stored , and a little slower .