Yeah, I'd love to have a Z-Series Zapco. It's my dream amp. But, it's a lot more extra bucks than the Studio X series. If I had the extra spendable cash, I would have a Z-150.6 LX. So, for the time being, I will have to settle with my KAR series Arc amp. But, OP, if you can handle the price, go for the Zapco Z series amp. I am sure you will not regret it.