I'm about to buy a notebook. Probably an Asus U36SD or U36JC. The difference is the chipset (HM65/ HM55), graphics card (GeForce GT 520M/ 310M) and the memory frequency (1333 MHz/ 1066 MHz). If I assume I will never need the better graphics card, what will I be missing with HM55? Got this feeling the faster memory won't make a whole lot of difference...