Zip? Avatar? Syquest? Which Portable Drive is a Good Deal?

Randy Scott asks: "Since Avatar went bankrupt and liquidated their assets, the Shark drives are being dumped all over the place. Been considering getting one, tho I know I'll be hosed when it comes to media or troubleshooting. Syquest is faster than the Zip, but they also filed Chapter 11 recently and the media is expensive. The main thing Zips have going for it is that everyone seems to have one (good for file sharing). My question is should I get an Avatar drive, Syquest drive, or play it safe and go with a Zip?" Hmm...decent choices...but what about Jaz, too?