I voted for the 2TB version made my decision of which only scarce 1.8TB are available. This corresponds to about a space between 30-40 titles in current games. The load times in games like Forza Motorsport 5 shorten by up to 20 seconds at GTA 5 pass just 6.3 seconds until the last recorded spawn.
In short, the investment has more than paid off, and the value is really great ...