Hmmm, since you've already swapped the plugs I am gonna guess no. My coils were still going strong at over 100k, I just bought these as I was preparing for a full tune up at 120K (but then sold it of course). I'd think at 60K unless oyu are having some sort of issue with 1 they should be fine.
Well in that case, the plugs will likely make more of a difference than coils would; but if you wanted to be safe it's easier to do them both at once than to go back again later (though it isn't hard to do plugs or coils regardless )
I'd love to sell them to you, but at the same time I don't really think you'd need them in your situation; up to you I guess