I would go with SSL 4K.
Universal Audio | UAD Charts
This is due to the fact that it takes way more processing power to achieve than the Neve. This means they may actually be doing some form of modelling (like the 33609, Moog, 1081) vs using standard algorithms.
I think the 88RS uses the standard digital linear phase EQ that you can get anywhere for any price you are willing to pay. Check out the Digital EQ, Fact/Myth thread.
Digital EQ Fact & Myth.
You'll get less channels, but they would be more authentic.