I have been primarily shooting landscape, although sometimes I also do family and candid pictures. I have a 5D II, 24-70, 70-200 (non-IS), and a 50 1.8. I will get a “grant” of around $6,000 soon and plan to invest the money into three L-primes. I probably will start with a mid-range one and then, extend into each end. I have never owed an L-prime before and would really like those of you who primarily shoot with primes to give me some advice on which three to invest and which one to start with. I heard people say that it is a good idea to buy every other focal length (e.g., 24, 50, and 135, or 14, 35, and 85), but I do not know whether it is indeed a good idea. For those people who have used both Canon 50 1.2 and Sigma 50 1.4, I would also like to ask for a comparison, because if Sigma 50 1.4 is as good as some people praised, I might save some money there and use the money for another L-level prime. Thanks a lot in advance.