There is a Cyrus Phono Signature on ebay for £785 from a top seller in UK. Allows upto 4 turntables. The Cyrus PPA is the most advanced and costs £1995 new. Both can be upgraded with a PS as well. I haven’t heard them, but then there are so many phono stages out there!
The Luxman E250 was also the first that sprung to mind. Does you deal actually have some options for you to try though? A problem might be with the fact that the loading settings may need to be different on each input. Some stages that support 2 decks have independent selection. Some don’t, which would be a pain.
The second consideration is that with such high end decks, selecting based on this feature may be limiting and preventing selecting one that you find has the best synergy with your deck and amp.
That 40PPA is a thing of beauty but the price incl separate power supply is quite prohibitive. Looks like I need to keep an eye out for a Signature with Power Supply
I believe some of the Cyrus phono stages can be used using the internal PS, and upgraded later with the external PS. They are great phono stages if you want to use multiple TTs as a friend of mine does with his 4 TTs.
I have a Cyrus Phono Signature with PSXR 2 Power Supply and it really is amazing. It supports 4 turntables and MM ands MC cartridges independently. All specs, gain, resistance and capacitance can all be individually changed while a record is being played. These can also be configured by the remote controller. I find it very impressive. So much better than my Naim Stageline S.