I recently made the switch from a 2010 to a 2014 and what a blast!
I picked up a 2010 SRT8 about 4 years ago and absolutely loved it. The only downside was the lack of off road ability. I had a lifted Rubicon before that so I went from being able to go through anything on or off road, to being able to handle small amounts of snow as long as I didn't rip the front scoop off.
I have been researching (and saving) for several years since then, deciding what was the next Jeep for me. I wanted a newer SRT, but did I really need it? The sensible person in me said no, put the 3 kids car seats in a V6 and save some gas money. I almost traded my SRT8 for a 2015 High Altitude, but I was worried I would regret it. After a couple HA test drives I decided to wait. As luck would have it, the SRT I was looking for went on sale. I was able to pick up a 2014 in showroom condition with 24,000 miles for my 2010 in trade and $24k out the door.
I was worried the extra weight would slow the 2014 down, but the 8spd transmission made short work of it. I have been able to hit 4.1sec 0-60 and 12.9 in the quarter, stock! (My 2010 bests were 4.3 and 12.8 with intake, tune, etc.) The cold air up in ND helps power a lot but it also gives me a few traction issues. The all season Perelli's are brand new and will still break loose on dry pavement in launch mode! Maybe look at some winter rubber for next year...
Overall I love the looks, the performance, the upgrades in technology, and too many other items to list. My 3 kids can ride safely in the back while the 2014 handles 2x more snow than my 2010 could with snow tires. And really, with gas prices where they are, who cares about 6mpg's anyway?
Thanks to everyone on this forum for sharing their experiences and insights. They were key in helping me find the perfect SRT.