changing to synthetic or part synthetic takes no special procedure, just change the oil. I would not suggest changing to synthetic until at least 1000 miles.
Personally, I would use any of the filters listed in the oil change DIY except Fram.
no oil filters that I know of come with crush washers... you are mixing them up the o-rings for the filters.
Crush washers are indeed a one time use item. $5 for on is ridiculous. Get new crush washers from any auto parts store. Just take the old one with you and match it up with what's available there.