AFTER YEARS I'M ABOUT TO PURCHASE A BRAND NEW BLURAY DRIVE FOR BURNING HD MOVIES ETC,ETC... SINCE I ALREADY HAVE THREE CD-DVD PLEXTOR DRIVES INSTALLED WITHIN MY QUADCORE PC, CAN ANYONE RECOMMEND IF IT'S WORTH INSTALLING IT EXTERNALLY... WHAT ARE THE PROS AND CONS COMPARED TO INTERNAL BLURAY DRIVES. CAN I RELY ON PURCHASING ANY PLEXTOR BLURAY DRIVES AS I'VE BEEN DOING FOR YEARS ? ALSO, IS THERE ANY BLURAY OPEN SOURCE SOFTWARE TO MANAGE VIDEO FILES AS SMART AND SIMPLE AS DVD SHRINK 3.2 I'VE BEEN RUNNING FOR YEARS ? YOUR REPLIES ARE KINDLY APPRECIATED ! TOBY