Spigen Neo Hybrid - Looks the coolest
Seidio Surface with kick stand - Actually had this case, I'll speak more about it
UAG Scout - Dont like it. Takes away the look of a beautiful phone
I've actually owned the Seidio Surface for my S2. In fact, it was the longest tenured case I ever kept on it. Offered great protection, and keep the form factor. I didnt have the kick stand, but I'm sure the build quality is identical.
*Note: I did own the casemate pop w/kickstand, and it was every bit as beautiful on my phone. Eventually gave it to the wife because I later got the Seidio. As much as I loved the case, I rarely used the kickstand.