crossfeed is actually good
Phonitor is a renowned brand - and they're
very experienced in implementing crossfeed. I guess, you'll get a
good one. As far as I remember they work similar to the 'meier-crossfeed' which I clearly prefer over other ones.
I couldn't listen a minute without crossfeed, and after having realized it digitally for a year or so, I have recently come back to hardware crossfeed , it sounds better to me - but, well, haven't done a rigid A/B-comparison, so I might be biased...
Nonetheless, I think, it's never wrong to have at least one crossfeed hardware implementation, for instance, if you listen to a source which you don't want to process through a digital equalizer (or can't: cd-player) - and maybe to the benefit of sound quality.