Depends what you're after. Can't go wrong with any SGP screen protectors or power support anti glares. I'm a fan of the Draco design aluminium bumper or the speck candy shell. I do have a nice looking slider case from adopted cases coming in for review in the new year. Will post pics here when they arrive.
Also check out elago cases. They make some real quality cases at decent prices.
I'll be sure to check out those you listed. I am enjoying the tech 21 smoke case for my iPhone 5. It's awesome. I wonder how many have purchased this because when I picked it up yesterday at my local apple store along with my phone. They said these sell out really fast. So upon that said I read up the review in the apple store app before purchasing it. Got a lot of 5/5 stars on its rating. So I went ahead and got it. I want to have another case though. Something that's close to the sleek feel to this tech 21 iPhone 5 case but more professional looking.
Also had a tech21 for the iPhone 4S in for review which was nice. Hoping to get an iPhone 5 version for review in the new year