alot of games only have the unlockable frame rate for debugging and testing purposes. if you can unlock 60fps on BF4 dont expect it to work smoothly
go for the cheaper monitor
but in seriousness. photoshop isnt that heavy, if you decided on an i5-4690k you wouldn't get a noticeable difference. maybe 1 second slower start up time. but if it's on an SSD drive youd never notice!