why did you choose the epl1 over the Panasonic GF-1?
With a P7000 and EVIL cameras ( EP2 and GF1), at ISO800 and up how much large can I print? Can I do an A3?
I forgot to mention that I would like to be able to shoot always in RAW+jpeg, what of these camera is the best at it?
I chose Oly over Panny almost entirely based on in-body stabilization - all lenses are stabilized. I wish Canon would go for IBIS, but that would mean they couldn't ask for a premium on lenses with stabilization so I doubt that's gonna ever happen. I also like Pens' design better; the Panasonics are plain ugly (and plain and ugly), and remind me of modern cars which all look the same.
For lenses I use Panasonics, as the Oly lenses have poorer IQ in tests. I also tested the kit zooms head-to-head (14-42/45) and the Oly had significantly softer corners and overall poorer quality, which agreed with tests I've read. Also, just yesterday I received a 57mm Hexanon f/1.4 for portrait work, still waiting for an adapter.
I print most of my keepers at A3+/13x19, and am very happy with the image quality. The first photo I printed (shot with the 14-45mm kit Panasonic lens)
blew me away, as it yielded results comparable to my 550D. E-PL1 apparently has a weaker AA filter than many other cameras in its class and most DSLRs, which would contribute to (perceived) sharpness. I haven't done any rigorous testing, but you can use DXOMark to compare sensors you're familiar with. I shoot almost exclusively at 200 (native) ISO, but I'd imagine anything above 800 ISO has marginal usage - depending on subject matter of course.
By the way, one major benefit of MFT and similar cameras for street work is that absolutely no one will pay any attention to you. If you whip out a full-sized DSLR you're
the center of attention, at least for a while.