Digital player built in 2005. Upgrades?

My Lexicon RT-20 has seen very steady use for cd's since 2008. Maybe 10-12 hours day. What should be upgraded or replaced due to age/ better parts availability? I'm sending it to a factory authorized repair depot and would also like to improve it if possible. The RT-20 has responded with remarkable! detail and dynamics improvement with Equitech balanced power and MIT Oracle power cords! (I realize the cost of the clean power exceeds the players value-but the results have been a "startling" improvement as heard through my Spectral gear and MIT reference cables--I'd never be without the power upgrades I've invested in)