Alesis Andromeda A6

Hi!

I've already asked this on two other A6 forums (code404 and electro- 
music), but I figure
can't hurt to cast a wide net:

What is anyone using as an expression pedal on their A6? I'm looking
at the Alesis F2 and the Roland EV5. Are they compatible with the A6?

My A6 is supposed to ship sometime next month (we'll see if that  
actually happens), so I'm
trying to see if maybe Santa Claus will bring me a compatible  
expression pedal for it.

Thanks!

Russ