CJ LS17 vs ARC LS15

Howdy,

I'm using an ARC LS15 with infinicap upgrade into Sim W10 mono's with Maggie 3.6's.
I want to add a little more midrange body/warmth without losing any detail, dimensionality and transparency.

I've tried the CJ PV14 which added that extra bit of midrange bloom but lost a little detail and transparency.

Would the LS17 be a good step up from the ARC or a sidways step? How much better is it than the PV14?
Any ideas?

Thanks

Rooze