best wireless controller?

[DJFury]

I am seriously considering the Fountech controller. The only edge Logitech seems to have over the Airstyle is the battery life (because of 4 AA vs 2 for Fountech which still lasts long) and the force of the rumble (which I won't be using much.) Other than that, the Airstyle seems to be the best controller for PS2 on the market today.

Question is can you use a memory card with the RF receiver for the Airstyle (as well as for the other controllers?)