The Audio Research Reference 10 is here $30k

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AR has 22 products. Replacing four products a year puts them right at a five year update for each existing product if the schedule Atmasphere mentions is adhered to. That sounds very sensible to me.
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I will just plod along with my used REF2 MKII

One day I will sell it and upgrade to a used ref3, maybe even a ref5 if its further down the road.

I listen mostly to rock though, and from what I have read the Ref2 was on the bass heavy side, so I worry that getting rid of it might be the wrong direction in my situation?

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No_money, .....when the time comes that you can swing the Ref3, get it. It is head and shoulders over the Ref2 Mk2. You will love it. I had the Ref2 Mk2 and loved it...once I got the Ref3, it was a game changer, and I'm still surprised at how good it is. No worries, you will still get your bass in spades.
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That's great to hear from someone who has had both pre's. thanks!

That's great news, I'm going to run out right now and purchase two of them, and then anxiously await the release of their next latest and greatest reference model