Isn't a panel just a (not-so-big) part of quality? I think for professional monitors (Eizo and NEC comes to my mind) there is a lots of electronics that provides consistency and wide-range adjustments.
On the other hand both Eizo and NEC have usually good entry-level models as well. They won't have all the bells-and-whistles though that you may find elsewhere like FreeSync/G-Sync, 4K etc. resolutions or 144k refresh rates... :/