I am considering the purchase of a 20' iMac however I am concerned about the 'afterlife' in about 4-5years when the computer is outdated and too slow. The computer will be outaded but the screen should still be fully functional. Do you think it will be possible by then to somehow resuse the screen with anothter computer ? Do you think a third party will find a way to modify the imac to accept a DVI input and be used just as a monitor. Thoughts, comments opinions ?