Tune it up?!
My hybrid '24 has plenty of oomph, and the first time I kicked it in the tail to pass, I was plesantly surprised.
IMO if you are not having any problems with your present Mav, why go into another 5 year loan situation?
At 41k miles you probably have most of "the bugs" worked out, and have thousands of dependable miles to come.
Best of luck no matter what you decide.
