You may also want to consider sending it to Steve Huntley at Great Northern Sound. Steve had worked at both ARC and Wadia and now has his own company specializing in high-end mods, mostly for ARC and Wadia products. I've had him do my ARC LS-2B and the results were fantastic and worth every penny. I recently had the opportunity to do a direct A/B comparison between my amp and a friends bone-stock LS-2B and we unanomously agreed the improvements were significant. I've also read some great reviews of folks who have had him do upgrades on their Wadia gear. Do a search here and on AudioAsylum (digital) under "Huntley" or "Great Northern" and see if you can find some input there. Also, you could phone or email Steve to get more specific information.
Just another possibility for you.
Marco
Just another possibility for you.
Marco