If you get PSS9's they come with springs, you can't use the H&R springs with PSS9. Might I suggest that your 330ci was "too soft" for the track.
I say that because PSS9's have a LOT of track miles on them among the Porsche community with favorable results. I think there are things you can do with the sway bars to stiffen up the suspension even more. As far as Motons go, the 996 Twin Turbo that I was out-hustling around the track in that video shown recently had Motons and I have the Bilstein PSS Damptronic setup. They experimented a lot with those Motons trying to get the best setup for the 996TT, my Bilstein's were almost perfect out of the gate, so I don't think spending 3x necessarily gets you a better suspension. The other question with an adjustable suspension is do you own your own alignment rack? Because if you are changing your suspension a lot for street and track you are going to become very familiar with one.
If your car is really doing 60% track and 40% street you should consider making it a dedicated track car and getting something else for the street because that means for every 4,000 miles you drive on the street you are driving 6,000 on the track and that's a lot of track miles....