TEX is crap, read my complaints in the TEK thread. The client source doesn't compile so you have to use a binary you don't have the source for. ZET is better than TEK but ZET was a massive insta-mine so it has no credibility, hence little price support. All the newer sha256 alt-coins are crap so far. I am still looking for one. Only TRC and PPC are viable atm. both have reasonably high difficultly compared to the other sha256 alts.
I'm kinda bs'ing with unObtainium coins. They have no trade value yet but it seemed new enough to put it on the side with low priority and see if anything kicks with it. I grump every time I see adult swim say someone had bitcoins at the beginning and hit big accidentally.
If you've got better post in the drillBit forums and we'll see if we can get a leg up on some new coin. I almost want batch 3 to have at least one chip to run litecoins ,just so I can scare someone with a 2Gig Hash chip.