Ensoniq Keyboards

My son wants a keyboard with a decent piano. He is 17 and a pretty good player. He is a guitar player but he wants to expand his business and at the moment he uses a Roland U20 but he's restricted to 61 keys and a very light keyboard which I think is great for some things but not for piano. I have found that Ensoniq keyboards are sold second hand for a lot less than the competition and I think that's mainly because they never really did as well commercially as critically. What I would like to ask is how good/bad are KT76 and KS32 and how old are they. I checked Harmonycentral and they love them but compared to what.

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