Hello, from a long time lurker first time poster! I currently own an iMac7,1: 2 GHz Intel Core 2 Duo 4GB DDR Ram ATI Radeon HD 2400 XT (128 MB) Screen size 20" /Resolution 1680 x 1050 I will be using it for Adobe After Effects CS5, Lightroom 2 and Final Cut Pro (workflow will include a Canon T2i/550d) The machine I currently have really doesn't cut the mustard now I'm trying to work with HD footage, and After Effects is a complete nightmare/sluggish! I understand the iMac i7 is a speed demon, however I'm not sure if I'm moving this Summer, I love to use a laptop and the advantages include being able to show clients my work. BUT, realistically how much speed difference will I see with MacBook Pro i7 / iMac i7 compared to each other and the iMac I currently use. Thanks all in advance, your help would be really appreciated.