Case for 80GB IDE HDD + 1TB HDD

I have 80GB IDE HDD...I want to make it External.

What should I consider before buying case ??
Is it possible to make USB HDD (No external Power) ?


Also...Suggest me 1TB SATA (3gb) HDD

--> WD Black or Seagate

if its a 3.5" external hdd, then i doubt you can do it without external power,if its a 2.5",then you easily can.

what do you mean by 1TB 3gb hdd?

ST31000340AS Barracuda 7200.11 SATA 3Gb/s 1-TB Hard Drive | Seagate

OR

WD Caviar Black 2 TB SATA Hard Drives ( WD2001FASS )

if you are confused with the brand,then both are more or less same.

1TB --> WD Black or Seagate ? (both priced at 2900/ at SMC)