15.4" 2.5GHz/250GB/2GB for $1299 (Discontinued, new and sealed) 15." 2.4GHz/250GB/2GB for $1999 (Unibody, new and sealed) Is it worth spending $700 to get the newer model? What's the speed difference? - My main apps are InDesign & Photoshop - I occasionally deal with 100MB+ PSD files - The laptop will be hooked up to a 30" ACD - Will either of these be faster than my Dual-Core 2GHz PM G5 that it's replacing? - Will the battery life decrease if used mostly in "clamshell mode"? Thanks!