When m43 first launched I was torn between the Olympus E-P1 and Panasonic GF1 and I personally ended up picking the Panasonic GF1 with the excellent Panasonic 20mm f/1.7. Today you can buy an Olympus E-P1 pretty affordable compared to a Pansonic GF1, which new and in the box with the 20mm f/1.7 has gone up in price (the last listing I saw was over $2,000).