Please do post your results
I will be very interested to see the resulting of your slides.
I just got a GSN and I'm going through various B&W film types to see which works best with it.
I am currently running a 36 exp. rol of Ilford XP2 Super 400, then will come a roll of Kodak 125 PX and finallly Fuji Neopan Acros 100.
I'm focusing on B&W right now as this is the one area that I find lacking with my 20D. Granted, I could photoshop a color shot to nice B&W, but at some point it seems you've done so much manipulation that you've left the essence of the image behind.
I have shot one roll of B&W through my GSN (Kodak 400CN) and the results are sharp (gotta love that Yashinon lens), yet overexposed to my tatse (still getting used to this wonderful piece of kit).
Btw, and totally unrelated, I picked up a nice strap at my local camera store for the GSN called the Gripper (by Domke). I has nice swivel unions, very grippy strap and well-designed leather bumpers to help avoid scratching the camera body at the strap lugs - check it out.