The best case I've found for my Galaxy Light is a $3.86 TPU case off eBay. Others had more protection but made this small phone into a huge brick. No decent Otterbox Commuter-like cases. I've dropped my GL a bunch of times, and the TPU has saved it every time.
When I got my Nexus 4, I bought an Acase Superleggera Pro since it was the most Otterbox-like. It's very nice, and provides great protection. However, it's a bit thick, and since I'm constantly swapping SIMs with my other phone, the dual layer construction is a bit tedious to undo/refit each time. So I ordered a Diztronic (smoke, I wish they offered blue). It's nicely made, but I feel like it's just not quite enough protection. Maybe it's the extra heft of the Nexus 4 over the GL, or maybe it's the more solid construction vs the plastic of the Samsung. Or maybe it's because I don't care as much about what happens to my GL. The TPU just doesn't feel like it's enough protection. Plus, the previous owner of the Nexus cracked the bottom corner of the screen from a 3 foot drop with a different (but ill-fitting) TPU case. Then she really broke the screen, but that's because she threw it at a wall, so I can't fault the case for that.
Relax, go nutz!