looks like you kinda shots muz really use a FF...haha...even 50mm f1.4 can't do the job...hmm, how about alternatively, learn to use flash and get ambient light so that you won't need to buy another body?
btw, I am rather curious with your shoots...can upload the shot that you took at f1.8 and at high iso?;p
btw, I am rather curious with your shoots...can upload the shot that you took at f1.8 and at high iso?;p