I just wanted to get some opinions here. I have an offer to do a straight trade: my MBP for an iMac. The portability is somewhat of a factor - would be nice but I can use an iPad in those instances if I must. The screen size is appealing, but the 15" is sufficient for me too. Is the iMac that much faster than the MBP (everyday tasks, video converting, downloading videos)? I do like the idea of using the iMac's wireless keyboard with the iPad too. Also, are they about equal in value? What would you do in this situation? Thanks!