Which I-mac

hi have advice please
in process of buying 27" i-mac work, work illustrator using mac mini , used computer.
getting such mixed advice mac retailers when ring questioning model should go . know think......
use mac illustrating using cs4 , no other programme installed or used on it.
model need , 2.7 ghz model okay , or 3.1 ghz model suit needs better. advice have been given retailers 3.1 ghz better speed wise ' graphics '......... talking graphics gaming , if waste of time never use mac gaming . or saying ' graphics' in design , photoshop.

many

 

any imac made in past few years run cs4 fine. cheapest 27" model if that's screen size want.

 

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