OP, if you are still interested in the SRT8 Jeep wait for the MY14 production. This will be a mid-cycle refresh. It will have the 8-speed auto, updated info/nav system, LED's and a bunch of other changes. Accordingly there will be a special model with a 6.2 S/C engine. The MY14 will begin production January 2013 (very short production cycle for MY13). If interested in more details Google is your friend.
I have a MY11 JGC Overland V8 has my DD. It has been reliable but some of the updates are needed.