I always get mine off Amazon, If you do the homework like checking reviews and reading the description well you should be able to source decent cases.
There is some rubbish on there too but you can find Spigen, Seidio, Verus....all good makes.
Switcheasy sells from their own website. I have never seen one of their cases in a store. I have purchased directly from them for the last 3 iphones I have owned.
It is very minimal looking but offers lots of protection and no screen protector is needed because the case is a clam. The only thing is, it can not be taken off and then put back on. So you can't change cases if that's what you like. But in all honesty, I haven't wanted to and it's been on since about the end of November.