I had the same choice about 2 months ago. Had to choose between a CPO 2.5 Sport 12.5K miles with CF interior and a CPO 1.5 standard, 5K miles without any upgrades.
I test-drove both cars. The difference in acceleration in standard mode is negligible. If you can tell the difference, it's probably the placebo effect or you are one of those rare people who can actually sense such things

CF and double DIN are cosmetic. Noise reduction? Who cares. I crank up the music volume, and as far as making phone calls - this is the wrong car to be talking on the phone. Enjoy the drive to the max. The phone is a distraction as far as I am concerned.
In the end I went with the 1.5 and I am spending the money I saved on such cool things as Nitron shock upgrades and other fun stuff in the future.
If you want the frills and the low noise interior and a 4-DIN whiz bang audio/video/gizmodo that works some times, Elon has a car called the Model S
