Hi I'm thinking about getting a 15" MacBook Pro (£1699 configuration with 512MB 9600GT). What is the performance for gaming, particularly titles like Call of Duty 4: Modern Warfare, Grand Theft Auto IV and Burnout Paradise, compared with what I'm used to on the Xbox 360? Is it something they could demo for me in the Apple Store? On a side note, any general things I should know before purchasing? I've been waiting ages for a Blu-Ray drive in a notebook and I'm bored of waiting now - can I replace the internal superdrive with a Blu-Ray one when the software/drivers in Mac OS X are released? Thanks!