Final Revisions...I think.

I'm at a point in my story where I think I'm almost done but I continue to read and edit, and edit some more. When do you make the final revisions and consider it complete? How many times do you write the first line, the first paragraph, the first page, and decide it's going to hook the reader and make them want to read every last word? I want my manuscript to be ready. To shine. To sparkle. To move young readers. I can't help but wonder if I'm almost there. Here's the first line from Melody's Song: The smell from the flowers in the living room nearly gags me and makes me wonder why people send them when someone dies. Does it compel you to want to read more?