Upgrading from the Schiit Freya+

I have a Schiit Freya+ that I really love.  I cant complain about it, I have upgraded the gain side to a great pair of RCA JAN 5692's and the buffer side to PSVANE COSSOR 6SN7's.  This is a great combo and really kicked the sound of the pre-amp to a peautiful place.  I have been upgrading me gear to end-stage type gear.  My turntable and amps are amazing.  I am trying to figure out if I will hear much of a difference if I upgrade my pre from the Schiit to something like a Sonic Frontiers Line 2 or another tube pre in the $3k-$4k range, or will the improvements be so minor that it may not be worth te money.  Given that I have put a little money into tubes I am just not sure how much of an improvement things would be compared to what I have now.  

I will say that I would like a tube pre with at least two xle ins and one XLR out.  Any thoughts on a step up from the Schiit in my price range or is it just not worth it.