[clickman]

Here's what I found when I was researching:

In order of shift distance, shortest to longest:

Porsche / B&M short shifter for 986 35% reduction
Agency Power 35% reduction
Schnell 30% reduction
Porsche 987/997 short shifter 997-424-983-00 25% reduction
Evo Swift Shift 20% reduction
Porsche 987/997 standard shifter 997-424-010-00 15% reduction

This is also the order of notchiness, most notchy first.

I went for the 9x7 short shifter. Easy install (entire tower), and the throw length was a huge improvement, without too much notchiness. I drove an '01 S with the B&M before I made my decision, and found it too notchy for my liking.