Took advice and no intake added...but....
After my last posting about adding an aftermarket intake to my 323i and reading that most were against doing so and gave me info on BMW's stock system and how efficient it was, I decided on getting an AfE drop-in filter (dry) instead. the car did run very smooth afterwards...so then I thought....could I even improve on the stock system any more ? So I added the Afe Dynamic air scoops...and YES! ....it actually does the trick. It's not mind blowing by any means...but it's noticeable! The throttle response is much improved! It's been about 3 weeks now and I'm pretty happy with it.