Pretty much personal preference on the sights. If you didn't shoot well with the all black, then stay away from them.
If the pistol you want hs the all black, but everything else is the way you like it, they can be changed out pretty easily, so no worries. There are a variety of sight combinations out there, keep investigating and trying them out as you can. You'll find the combo that works best for YOU. Mine is a three dot setup with tritium ringed green front and tritium yellow rears. All my carry weapons are set up this way.