I'm going to buy a new mac, and i'm not sure which one i should buy.. I am currently working on some commercials and my other mac couldn't do the job anymore. I'm going to need a pretty powerful mac to handle my projects and now i'm wondering wether i should buy the most upgraded MacBook Pro 15" or the 27" imac i7. I know that the iMac is going to do the job better, but it's going to be a pain un the ass to drag around since there is going to be a lot of traveling. Is the difference between these two machines really that big? Is it that big, that it is worth draging around a huge 27" iMac everywhere?