Doepfer

Hi all,
I will receive soon my A-100 (just wait doepfer shippin-:) and I have
a RME fireface 800 soundcard.

My question is about the best way to record the A-100 in my computer
with the fireface. 
Does I will need a DI Box to adapt impedance of a A-100 patch ? or not
? what is the output impedance of the A-100 ?
And if I need one, does the Avalon U5 do a great job to match A-100
impedance and boost signal, and is it worth money ?

Thanks a lot.

Julien.