As for the coolers, it really depends on your system. You wouldn't need something like the Massive23 from ThermalTake for a mid-range 14" class system, but generally, brands such as ThermalTake and CoolerMaster and Antec make decent chill pads.
The ThermalTake Massive23, in that case, wouldn't be a bad option if you went for the 15.6" y500. Whichever you go with, I advise avoiding the plastic ones. The metal mesh coolers will add an extra level of heat dissipation.