I want to buy In-Ear earphones that will be used mainly to my iPhone 4S and to mycomputer the MacBook Pro.
I do not know if I should choose the Shure SE535 or Grado GR10
Which one would you recommend me? Or in this price range would you offer meany other earphones.
I'd love to be helped in you and hear your opinion.
Thank you.

Welcome to Head-fi, langerrrr!
 
Considering that you're investing triple digits into a new pair of in-ear monitors, you might want to have a quick glance or two at Joker's gargantuan in-ear monitor shootout beforehand: http://www.head-fi.org/t/478568/multi-iem-review-205-iems-compared-j-phonic-k2-sp-added-11-13-11
 
To be honest, there are many factors that go into the purchase of audio monitors in general, let alone triple digit IEMs. The source and amplification of sound, your unique perception of sound, the genres that you listen to, the locales you frequent, preferences between bass, treble, and/or both, etc.
 
Of course, a simple comparison between the two in-ear monitors could easily be done; providing more information about the projected usage for such headphones would lessen the load for repliers to this thread. Pardon my audiophilic ignorance, but good luck with buying some proper solid headphones.