It would depend on if you were close to apply for a loan or mortgage. Cancelling a card will cause a temporary slight drop, but if you do indeed have "too much" credit available, it will haunt you in the end. Perhaps cancel one every 3 months or so until you have only 3 or 4. Meanwhile consistently use your main cred. cards (use, then pay) during that time. That will help keep your score from dropping.

