I went to a camera store today, and the chick who was helping me out told me that the nikon 18-55 kit lens was as good as the nikon 50 1.8 in terms of image quality at F5. Is this correct? I originally went there to check out the tokina 11-17. I can get it for $560 out the door. Should I get it? My wife would kill me though. Girth would say buy it. Jcolman would say buy it. But I need opinions of those who are fiscally responsible.