there are so many different external enclosures on ebay (brands, etc), i was wondering if anyone had any experience with any of these, or if any are recommended/stay away from
I'd be wary of a used enclosure, the fan or power unit in it could be limping on its last leg. Can't think of any that I would avoid, but name brands like ThermalTake come to mind for one i'd recommend. Look for an all metal unit (aids heat dissipation), and an internal fan (some harddrives can get damned hot).
Personally, I'd also look for one that has multiple interfaces (USB2.0, eSATA, FW) to assist portability/compatibility. Even if you don't have eSATA now, a 20 dollar card can get you into the SATA generation.
your better off goin to a retail store to check it out. get esata if you have ports for it.
i'm using usb 2.0 but thats ok as well but check the enclosure for transfer rates and how much space it can hold. other things also like airflow and what the enclosure is made of.