PASM makes the car ride even softer than the standard shock setup, but tightens things up when you get into a corner, so yes, I highly recommend it.
I stiffen up the shocks whenever I'm driving... aggressively. If you're not planning on driving on a track, you won't use the stiff setting very often.
The Sport Chrono is a "nice-to-have". If you have the moolah to burn, I'd say get it, even if the wart is ugly as hell. But if not, I wouldn't sweat it.
Bottom line, you want the PASM.
