So I am selling my 20" iMac to make space for a new MBP as I cant really ship the iMac around to easy. Tried ordering a bag for it but after 1 month still has not been delivered and no one can find it. The store in France is not responding to my mails so beware. I wont mention the name yet! Now I can seem to make up my mind between the 15" or 17". I dont do that much traveling. I guess bigger is better?? Is the 17" not big and bulky, I have not put the two together so cant really compare, oh yeah and I have a 15" HP. Any recommendations please?