For anyone who uses them....am buying a laptop primarily for recording and music oriented purposes. WIll also be plugging in a Yamaha G 50 MIDI convertor for use with Reason Soft Synths. Probably running Sonar 7. What config do I need for the laptop? Some ideas for brands etc and price range would also be helpful. Also do I need to buy an external soundcard with MIDI I/Os etc. and if so, which one?