By the way, I am 61 years old. I recommend the poly bushings while you are at it-doesn't hurt the ride, just makes it feel more controlled.
You want the BMW feel, you will get it very very close with Tokico, Eibach, poly bushings, also poly spring isolators will help smooth out the ride and will last, unlike the crappy original equipment isolators.
I also like the Yokohama AVSdb 16/60-225 tires I bought,and had siped. The 225 has an extra belt and the slight increase in size helped the small inaccuracy of my stock speedometer. Very quiet tires, hold road very well, super wet traction, seem to wear well. I have 20K on them now and they are about 1/3 worn.
I highly recommend replacing the Y pipe with a decent one. I gained some power, engine runs better, and gained a couple miles per gallon, not to mention a real surprise - I am able to use regular gas now with NO pinging whereas before I had to use midgrade. I also replaced the crappy resonator with a "cherry bomb" type muffer, a good one. Its quieter inside now, but outside I can hear a nice low note.
I do not hot rod the car, just want a BMW, just like you. Parts are a LOT cheaper, too.