You can get the same "hot rod" effect with a set of Ref 300s with half the cost and effort. Even the half power of the 300s is more than needed as others have already stated, but that doesn't seem to be your goal. I would have ARC go over the amps regardless of tube age. Just like a high performance engine these amps need an open check book to give their best and avoid costly repairs.
Audio Research Corporation ARC Reference 600
Has anybody had any experience with these, good or bad? I had VTL MB 750's before and loved them, but had to sell due to finances. I see the ARC Ref 600's use a lot of tubes. I do not need a that power, but I like the whole paraphernalia of the hobby. It's like having a hot rod. Sure, you don't "need" 500 horse power. Lol. Would anyone recommend the ARC Ref 600's, or should I look elsewhere?