What weight would be considered skinny for a guy that's 5'7''?

I'm trying to lose weight and so far so good. The most I've ever weighed was 231 and I'm now down to 207. I'm 32 years old and I want to be fit again like I was when I was in my mid-teens before I let myself go. I was like 150 something back then. My goal is to go back to that weight but at the same time I want to weigh 135 because I want to dunk a basketball and I read that Spud Webb was 5'7'' 135 when he won the slam dunk championship. So do you think that 135 is too skinny?