Hi, i am new and i am near to buy a surface pro 4. I need the computer for import photos into lightroom, make some fix and export them to whatsapp, facebook or import again in my main pc desktop. I wanna a daily machine for this and surface give me also pen. I doubt about 3 things: 1) what is better i5 or i7? (The conifg will have 8gb and 256gb ) 2) it is true the throttling problem or microsoft fixed it? 3) It is a good idea take 12" or go to other device with 13"and more?