I have been swearing at my PC long enough and I think it is time to go to a Mac. I am looking for a desktop (already have a work laptop) and I do not anticipate needing any mobility. My question is related to what I need to work with the programs I will be using. I do digital photography and currently use Photoshop and Lightroom. I also play guitar and want to take advantage of Logic Pro X and all that it can do. Other than that I anticipate the machine only being used for other basic applications and a little video creation/editing. I am looking at the 27" iMac. I already have iPad, Apple TV and iPhone 5, so converting to an Apple desktop I am sure will make life easier. I guess that I am looking for some feedback regarding processor, RAM and graphics. I hate slow...already have that. i7 recommended? I know that I can upgrade memory from Crucial...but how much is too much? Fusion drive looks like a must? Any feedback would be appreciated. I have never owned a Mac but looking forward to the experience. Let me know if I am forgetting something. Not a huge rush so waiting for the next update is fine with me. thanks.