I purchased a used E-P1 for my wife a few months back. We both like the camera, but the autofocus and overall speed is lacking. I'm looking to upgrade from the E-P1 and stay under $350. I'm open to either Panny or Oly bodies. A EVF would be nice, but we also like the small size of the PENs. So, what would you recommend. Olympus has refurb E-P3 w/ 17mm for $259. Would this be enough of an upgrade?