When I totaled my wife's TM3 AWD (I hit a curb and sufficiently gooned the suspension for my insurance to total it), we were torn between replacing it or upgrading to the Performance. In the end, we got another AWD with aero wheels and:
Bought a new set of 19" aftermarket rims and high performance 245/40 R19 Michelin Pilot Sport A/S 3 Plus tires ($2,000)
- Bought the speed boost ($2,000)
- Installed a carbon fiber spoiler ($300)
- Installed wheel spacers, 15mm front and 20mm aft ($250)
- Installed red brake covers, ($250)
So, for under $5,000 more than the AWD, we get:
- similar summer compound yet wider tires than the Performance's; they both look better and also protect the
- stronger, lighter, (subjectively) better looking aftermarket 19" rims, which are better suited for our pothole-rich area of town
- a 1" higher suspension, again, better for our steep driveway departure, many speed bumps on our street, and all the potholes
- smaller brakes, for better efficiency (we'll never track this car)
- a spare/aero set of wheels and tires, for long distance road trips or as full size spares
- a car that is visually very close to a Performance (true aficionados would notice the brake covers, the glossy carbon fiber spoiler, and the lack of underline in the Dual Motor badge; the wheels are not a good indicator, as many people replace wheels)
- a car that is imperceptibly (to me) slower than the Performance