I've currently got a 14/20/45 trio, which I really enjoy. Nevertheless, I'm thinking of one of the two non-budget primes: the 12 or the 25. There are times I wish the 14 was a tad wider, and other times that the 20 was slightly tighter and faster focusing. If I picked one, which do you think would open up more photographic possibilities? In other words, a 12/20/45 or a 14/25/45 trio? Thanks!