LOLOL.. she does photography.....
it's not really that important which monitor unless she does "PRINT"
And in which case you need "2" monitors.. one calibrated for the printer, and one for the desktop work.
If she's just amateur, yay, look at me, I can takez pictars... Then really let her know that it "DOESN"T" matter.
DO NOT get one of those 27" for photoshop... taller monitors are better for shop... 16:10
The ghetto priced 27'' and 30" are of terrible quality... and for photoshop, dead pixels WILL bother the user more, because there's nothing "MOVING" on the screen to take your attention away from the dead pixels..