I'm down to choosing betw 2 laptops, identical except 1 has better 15.6" display (vs 14") BUT smaller drive. Both drives are SATA 7200RPM, both systems have identical great processor & 4G mem. One SATA drive is 250GB the other 320GB. Since I'm buying this to get better performance but don't want to go backwards on screen size -- am I losing anything with the 250G SATA 7200RPM drive??? Price is virtually identical.