Which are correct:
1-He is a man that you admire when you meet.
2-He is a man that, when you meet, you admire.
3-He is a man that you admire when you meet him.
4-He is a man that, when you meet him, you admire.
5-He is a man that, when you meet him, you admire him.
I think strictly speaking only 1 is correct, but I have the feeling that all but 2 are acceptable in informal English.
Wouldn't it be better if we reword it as follows;
He is a man who(m) you would admire if you met him.
PS:I couldn't make up my mind if "him" at the end of the sentence is redundant.