Galaxy SL is the latest addition to successful Samsung Galaxy S line and I know that many owners now look for worth to buy genuine leather cases. In terms of quality and price, there are only a handful choice of leather Galaxy SL cases on the market.
My favorite is newly released Melkco leather cases for Galaxy SL I9003. I owned their black orange combination of Galaxy Tab case and wanted to buy again from them. It occurred that this is a right decision. Here is my Galaxy SL case by Melkco. It is a book type model similar to my already owned Tab case. Actually, I could wait until they release the limited edition black orange color model of this case, but could not resist myself.
The case is made from authentic leather — cowhide is the specific term — and stitches on the case complement the attractive business type style. As you can notice from the following images, the case has special holes for phone features (buttons, jacks, ports and so on). Notice that there is a whole for camera functions as well on the back.
Buy this case online on CarryMobile.com (with free worldwide shipping)
I knew that some other cases have reflection problems but not this one. I have tested by taking photos with flash. So far, so good. Maybe, you are asking what that tiny hole on the back of the case is. It is the slot for belt clip usage. The kit is sold separately (just $6) and very easy to install on the case. See the video below too.
There are other variants to Melkco Samsung Galaxy SL cases. Actually, they differ a bit and these differences involve how you open the case. Vertical openings are called as flip type cases. See the images.
I know that Melkco will eventually release my favorite Jacka limited type cases which are in combination of different colors such as orange/black, red/white, red/yellow etc.
p.s: Do you wonder how my Galaxy Tab case looks like? Here it is 
More Melkco Galaxy Tab case images here.