The GF1 was good but it was a very early generation m43, any recent one from Panasonic or Olympus gives much better performance overall and will easily outperfo

The GF1 was good but it was a very early generation m43, any recent one from Panasonic or Olympus gives much better performance overall and will easily outperform your D70 (I moved from GF1 to E-M10 a few months ago).