I'm about to finally migrate from PC to Mac. I plan to do digital photography, maybe some video and audio. I'm sure a MacPro (dual quad xeon processors) would handle anything I throw at it (D700 images, scans, Photoshop + Lightroom, HDRI processing). but is the MacPro overkill ? There seems to be such a large gap in processors offered between the MacBook Pro (core2), and the MacPro (dual xeons) for more or less a similar price. If I go with MacPro , would it make sense not to order it with just a single xeon to save $500. and 4gb ram. thanks in advance for your practical advice !