Mark,
Honestly, since you live in WA, I would recommend the heater and top. As Jay stated, the heated seats would be a good option. The glove box is not needed. You don't need the M3 suspension or limited slip differential but I would recommend the 3.4 gears. Also, the
oil cooler is not needed unless you are planning to race the car. Highly recommend the 17 inch wheels because they fill out the rear wheel wells and they look awesome. Again I will agree with Jay and highly suggest the Ray Dot Mirrors and 3M Rear fender paint protection. I would also highly recommend the ceramic coated headers.
If you have any questions, please don't hesitate to call my brother Bill or myself.