nice friggin car @graeme20! I love the wheels too! I have a 2013 JSW M6, Malone Stage 2. but I'm in CO. Quite a drive for a "spin".
Recently I had to go back to stock to take my car in for an "issue" at the dealership and I can tell you, its just a car, or "meh" as you stated above. There was more driving enjoyment when I had the tune on it and I plan on putting it back on as soon as this "issue" is resolved.
I'm updating in stages. Started with the Stage2 on stock ex, but have a Darkside DPF/CAT delete to install. Then I can go to Stage2.5 (2 with deletes) per Malone.
Although I haven't had the time I am looking forward to installing this new DP with deletes soon. I did a turbo-back on my 5.9L Cummins and gained 4 mpg. The Cummins def flows some air with the ATS Arc-Flow, MBRP exhaust, and Smarty Jr. tune.