The fourth-gen browser will be faster, available in 64-bit edition, faster, sport a streamlined UI, faster, better for Windows 7 – oh, and faster.
I need a relatively fast hard drive (random access). For the same amount of money, I could buy WE Velociraptor (250GB, 10kRPM) or WD Red (1TB, 5400? RPM).
No. More and faster hardware is the only thing that makes compilation go faster. More RAM, use an SSD if possible, faster processor if you think it is cpu bound. [by TrevorH]