Crossover with variable slope and time delay

Lets back up a bit.  Why do you need this?  What is your goal and how are you thinking you might achieve this?

Otherwise, you can always use a miniDSP unit between your pre and amp for this.

I have a Devialet Expert 400 running Wilson-Benesch Vectors with a distributed bass array powered by a Dayton SA1000. I am considering upgrading and was initially simply going to replace the D400 with a D440 but I do not want to rule out other components that might also fit the bill. Willing to go integrated or separate. I also need a moving coil phono input and DAC is desirable since I have limited space and wish to maintain the WAF. I think 150 watts at a minimum, recognizing that not all watts are created equal. 
I have looked at Bel Canto Black, McIntosh, Levinson, Anthem, Trinnov Amethyst, Legacy Wavelet, and others. 
I believe time correction and the ability to apply different slopes is important. Happy to be convinced otherwise because it opens up possibilities.

Thanks for asking, Erik. 

NO worries. I just wanted to understand just how much flexibility you needed and whether you had the tools and experience to set them accurately.  Otherwise, a system with built in room calibration is a lot more suitable.

You can use almost any of the miniDSP units for your needs.