I have the Nikkor 50mm f1.8G lens and it's great. I really don't think it's worth it to spend the extra money on the F1.4 lens when it's only a few Fstops difference , and especially when it's nearly $200 more then the F1.8. My personal opinion is that the F1.8 is enough for what it is. So I say you go with the 1.8.