Recapping Mark Levinson 33H monoblocks

Thoughts on if I should spend the money to recap my Mark levinson 33H monoblocks?  What else gets old and prone to failure or affecting the sound quality.  Getting new speakers soon, Wilson Alexia V, and will at some point get new amplifiers.  I know new amplifiers will sound better than the 33H.  Just wondering how much time and electronics inside the amp would have to be replaced.