No regrets. I honestly feel like if I got the V8 I'd have regrets...I'm a dealer though, so if I feel like taking one of the V8's out for a spin I can...I'm fine with being a second slower than the 8, while also running regular fuel at 22mpg, in a 323hp car that looks and feels badass.
Two of my peers at the dealership have the 2016 SS standard tranny, they sound amazing but not something care about.