Just got my OM-D and I'm in love with it! I really want a prime to go with my 12-50mm zoom (also have a refurb'd 40-150mm on it's way). I'm looking for a lens that I can get nice shallow depth of field and well suited for travel photography - mainly street type situations. Typical would be like a market - wanting to focus on a couple of people type of thing. I really want both lenses, but which would you recommend first based on this? I'm probably favoring the 20mm at the mo but I love the photos I've seen from the 45mm!