If I were in the market for a Leica 50mm, I would get the Summicron APO over the Summilux or the Noctilux. Price wise, I don't believe that it is unaffordable going by how people can buy into the M9 in the first place. It may be expensive to many of us, but going by how often Leica lenses are out of stock, I would consider their lenses as underpriced. If there is anyone here who cannot see my logic, just think of COE, COV or useless diamonds you buy. If you have paid for any of the three, you can buy the new Summicron APO.