You don't say whether you have an 01 or 02.
I have an 01 so my comments apply to it, haven't driven an 02 which has the same swaybars, but modified shocks. I use it on the street as a daily driver and for long trips.
Stock there was way more body roll than I like in hard cornering and there was a strong tendency to side step the rear when hitting a bump or uneven spot in a corner. The overall feel in a corner seemed relatively loose and didn't feel to me like I could really tell where the limits were.
Went to a GM T1 front swaybar and now it corners flat under any conditions. Got single adjustable Penske shocks from Guy Ankey Racing, his choice of the valving for my street use. Stopped the side stepping under even the most severe provocation. The combination makes the handling feel much more solid and secure.
As to ride quality, the T1 makes it a little more sensitive to expansion joints and the solid metal links make some noise. The Penskes are hard to describe, but they are not exactly firmer than stock and less harsh. They just follow the road surface exactly with no overshoot at all. Not as harsh as Konis that I have had on a previous Porsche.
Costly modification, but if you really like a tight, sweet handling machine its worth it IMHO.