That’s exactly how I am, I want to set my car up to enjoy driving it all the time not just the occasional Sunday morning. I’d rather get a new school Challenger than just have a nice car sit.
After having a 2015 R/T 6M, I've got to say a new Challenger is a great driver. It's kind of the target for my Duster. In theory, with the 5.7 and a wide ratio T56 and the right gear and wheel size, it should feel about the same on the highway, RPM-wise.
Edit - Honestly, in my opinion, a new Challenger is the easy button if you want drivability. I like the style, they cruise great, and even a base R/T is fast enough to be fun. No fabrication or tuning, just buy it and drive it. Only reasons for me to do a G3 swap on my Duster is I don't want the car payment, I like to build things and be different (anyone can buy a Challenger) and I don't have the space for 2 cars.
