Handling is AWESOME. These are the only spring/shock combination I have experience with so I cannot say it is better or worse than the sport spring, but I would imagine it's better considering your center of gravity is that much closer to the ground. The ride is bumpy, but for me, I love that feeling. I like the siffness and the response I get from that in sprited driving. But, I could see how it might be too much for some people
A big reason I chose the race springs over the sport springs is because of the look. I love the look of a low car and the sport springs just did not give the look I desired.
And I wish I would have saved up for coilovers to have the adjustability. I think it would be fun to be able to adjust the height, giving you any look you desired. Also adjusting to any height depending upon your driving style, streets you drive on, and overall cornering performance.
I spent $900 on springs, shocks, and installation for both (different occasions). The PSS coilover will probably run you a littler over a grand with tax, shipping and installation. It's up to you whether it's worth it or not
-Brandon
Let me know if you need any more info