Upgrades for older Conrad Johnson?

I'm buying a Conrad Johnson tube amp, the older MV75A1 from a guy that is going to send it in first to C-V for some noise issues it has. While its there do any of you recommend other upgrades that may benefit the sound? I dont really know the amp or what services they may offer but I was thinking an upgrade of the caps if they offer it would make sense. What do you guys think of that amp?