hi guys.. i have my 450d eos cam with 18-200is lens which is included with the kit.. i would love to learn to shoot from portraits and macro.. and telephoto shots also. I enjoyed every shots taken from 18-200is lens but there's something missing in it.. plans to buy the nifty-fifty 50mm f2.8 or the 50mm f1.4.. 'cause it cost less and have good reviews too.. envy also with 17-55mm is usm f2.8.. what would you suggest best for my second lens or any other lens based on your experiences. thanks thanks in advance