Dave Smith Instruments SYNTHESIZERS

hi folks)
perhaps some people here could be helpful with this.
to what extent is evolver midi controllable?
what i mean is how many simultaneous parameters can be controlled 
with midi?
i'd like to try using a controller like the midiman surface one, 
which is quite full featured.  
any suggestions?
from what i gather from all these excited individuals,this sounds 
like a great synth.
however being an analog fan who's used to many alternative type 
controllers (theremins, ribbons etc.), i don't want to simply play 
the evolver with a keyboard or simply play with the sequencer.
the eight knobs and matrix doesn't sound appetizing either (coming as 
i said from a modular analog type point of view.)
if i could use an outside controller to do all the tweaks twists and 
turns that i like, that's a different story.

thank you in advance to all of you who offer advice.

))))))tom