Count me as agreeing with Kontact.

It's just not enough change to warrant spending more than a few bucks on. The real question turn on why you'd bother. The difference is essentially a half step between the smaller cassette sprockets, so the only reason I'd bother is if I chronically found myself bouncing between a gear slightly too high and one too low,

Otherwise, if you are never using the outer with the outer few cassette sprockets, you might want to do something more material, ie. going down to a 46t outer, or something in that range. That's about 15% or equal to 1-1/2 cassette sprockets. Assuming that sounds right, consider that you'll definitely and to lower the FD and check how far you could, or buy a new one suitable to use with the new combination.

So, take the time to think about what you really want, then consider all the options and implications.