Sell the 45mm f1.8 to fund a Pany35-100mm purchase? Or would selling the 45 to get something like a cheaper Oly40-150mm or Pany45-175mm do the trick if one was looking for some more length on an EM5? I understand this is a very subjective question, though by way of info, I don't shoot super long most days. On the other hand, I am looking for a little bit more length than 45mm at times but did not want to add another expensive prime (I don't own the 75mm). I could go cheap but I'm a bit worried about the speed of those latter 2 lenses and the f2.8 of the 35-100 intrigues me somewhat as I do enjoy nighttime photography. Any personal experience/suggestions concerning the 3 lenses mentioned above are welcome.