Bootom bracket replacement?

I'm getting ready to replace my 2009 SRAM Rival 53/39 crankset with a new Rival 52/36 crankset. The original has 61,000 + miles and is noticeably worn, although it still works fine. I'm really replacing due to the lower gearing.

My question is....should I replace the original GXP bottom bracket also, as a matter of course? There's no issues with the BB currently, other than it has 61,000 + miles on it. There's no discernible roughness or play or noise.

Thanks.