As someone who gets to handle a lot of cases I have a couple I cycle through.
Right now I'm using the
OtterBox Defender, I'm a bit clumsy so this makes me feel a lot safer while carrying my phone around. This one is pretty thick though so I doubt you'll like it.
I have the 3800mAh battery for my phone as well and when that's in I use the
Seidio Surface case extended since it's one of the only cases I've found that fits it.
Then for around the office or at home I use the
CruzerLight Androidified TPU Case, I think it looks stylish and I love repping Android, It's pretty thin as well.
I'm a huge fanboy of AOKP and I can't wait until my
AOKP case comes in