PEN + Panasonic 20/1.7; UPDATE: bought! First impressions As eluded to in my earlier post I'm in the hunt for the perfect m43 combo, which I think might just be the E-P2 with the Panasonic 20/1.7 pancake lens. Does anyone here use this combo? How's the AF speed? Edit 26/1: Picked up my E-P1 and 20/1.7 today! First (very positive) impressions here.