Re: What Hard Drive to buy?
The only limitation is transfer speed. If your laptop only has SATA2, then a high performance SATA3 SSD will not perform to it's fullest ability.
The most important speed factor when buying a HDD (not SSD) is the RPM. The factors you mention helps gaining speed, but 2 harddrives that both are of quality brands and both spins at 7200RPM are gonna perform somewhat similar.
MOBO: Asus Maximus 6 Hero - GPU: Gigabyte GTX 980ti xtreme - CPU: I7-4770K - PSU: Corsair AX760
RAM: Corsair Vantage 2x4GB - SSD: Samsung 840 Evo 512GB - Case: NZXT H440