I am going to order a new HP dv6t laptop and the only question I have in customizing its configuration is whether or not to opt for a 750GB 7200RPM HDD over the standard 750GB 5400RPM HDD. Both drives come with 32GB mSSD acceleration cache. I realize that the 7200RPM drive will provide faster disk I/O, but I'm wondering at what penalty in generated heat, noise and battery-life? I'm not concerned with the cost difference - which is only $20. Any advice/insight would be appreciated.