The first one of course.
But you'd better get a SSD if performance is what you aim for.
Edit: Now most people will get a 256GB SSD for their OS and Software, and a secondary 1TB Black for the Data (Pics, Music, Movies, etc...). A solid combination would be:
1 x Samsung 840 "Evo" 250 GB
1 x WD 1TB Black
Very good bang for the bucks too.
I can't really spend the money in a SSD right now. Do you think that it is worth getting 2x REDs for video editing and gaming? Is it a lot faster than a single 1TB Black?