I don't have a lot of experience with it, but my short listening and my dealer's opinion lead me to believe the Jupiter falls between the Apollo and Planet 2000.
Some may prefer the Jupiter, but its more of an individual taste thing than anything else. They sound somewhat different, although they both have the Rega sound and philosophy.
My dealer was having a difficult time selling their demo Jupiter after it was discontinued because they and most customers felt that the Apollo was better for about the same money. I auditioned the Jupiter briefly when I bought my Apollo. Had it not been for the Apollo, I'd have been very happy with the Jupiter at the demo price.
I compared a Jupiter to an Apollo. When auditioning, the dealer offered me the Jupiter for almost the same price as the Apollo. But I much prefered the Apollo as the Jupiter sounded much more laid back which, I guess, may appeal to some.
BTW - the Jupiter in question had been modded with high grade inputs and better caps by the dealer. So my comparison was not with a stock standard model, though the dealer insisted the mods created a notable improvement.
Sorry Kevin....I can't take any of the pain relievers with a standard analgesic due to another condition I have so I have an annual prescription filled for Oxy and Flexiril for my back. Usually 20-30 pills each. I throw away more than half every couple of years due to age...addiction to that kind of drug ain't in the cards for me. In fact I'm already tired of the Oxy and tapering down...even though the pain hasn't subsided.