It's gonna be whatever works for you. You've GOTTA go to a store like Fry's that has lots of monitors and check each of 'em out. Sharpness, distortion (edges and such), color saturation, etc.
You may find one bevelled monitor you just love even next to the best true flats. Or you may not. But it's your eyes that have got to look at the display.
I personally love my old Trinitron 17" bevelled monitor. Razor sharp display with no visible distortion.