Which external drive to buy?


I want to buy an external drive, both USB or Firewire will be fine. The most important criteria is the writting quality (with most of the media since I don’t feel like buying only one type of blank media) then the capability to backup protected CDs/DVDs. Regarding the 3 sheep tests, are there any new games still using that old SD 2.9 protection? Is it worth buying now a 3 sheep burner? Are there any external 3 sheep drives?

Please give me some advices in picking a good drive, I will consider all the suggestions.
Thank you.