My wife encourages me not to spend too much money on lenses and cameras, but she sounds at times "like your father, James". She asks me to save money and then buy Leica or high quality CV lenses or lenses made by well known manufacturers. They make also better investments. At one time I was interested in all 50mm Leica made lenses that I was then able to buy. I got a few lenses in user condition, and I skipped the costly ones such as Summilux or Noctilux, but I managed to buy a Summilux 35/1.4 and a Summilux 75/1.4. Both lenses have appreciated in value, and I enjoy using both a lot. It was a good investment. Would I enjoy as much a replica 35/1.4 or 75/1.4 (or faster)? Most likely, no.