I was wondering if I am the only one constantly trying out new software for doing my GTD stuff.

I've changed a couple of email clients in the last few years, but my real weakness are the task managers. I've tried a huge number: for PC, for Mac, web-based, for Pocket PC (back then), for Windows Phone, and now for Android. And I still can't find the perfect one.

Anyway, do you have a steady GTD setup, or are you trying constantly new tools?