Well I wasent sure so I thought I put that up there just in case. If you do have a drive already it be really helpful to know if it sata or IDE.@ Seth
I don't think he's looking to buy an external hdd, just an enclosure for one he already has.
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The Bytecc enclosure seth linked does look pretty good.
is the hdd you are using IDE or SATA ?
If I were you, I would look towards getting a drive enclosure with esata support.
When you use esata, it has almost double the power and performance then USB 2.0