Slee Reflex M vs Schiit Mani 2 vs Fidler Spartan 15

I’m currently running a Rega P3 with Exact cartridge and Neo PSU through a Schiit Mani 2.   I’m looking to upgrade the phono stage without breaking the bank.  I’ve been demo’ing the Slee Reflex M and I’m very torn on it vs the Mani 2.  It’s clearly more musical and has a better soundstage and detail, but it seems lacking in the bass. The Mani just gives the bass a bit more punch and bite.  Has anyone compared the Spartan 15 to either of these?  What are your thoughts?   Any other phono stages to look at under $750 that would clearly be an upgrade over the Mani?