It really all comes down to what you are using for. In general though I try to buy guessing what I will need 5 years from now rather than what I need today. Of course you can not predict future technology but you can at least take a guess.
Drives are one of those things where you can never get too big. Today we are measuring them in TB. A few years ago in GB. Awhile before that in MB. Back in the apple ][ days it was in KB. You can pretty much see the trend, even if you can not predict the exact years.
I ordered my machine yesterday and the specs are WAY beyond what I would need now. Just as the specs on my 2007 machine then were out there but now it is almost pokey for intensive tasks.
As a comparison to your question though I went for Apple's 3 TB hard drive. Then I added a 480 GB SSD from OWC as an external (512 - overprovisioning), a 4 TB thunderbolt drive for timemachine, and will do full backups on 4 TB drives using a voyager q.
Drives are one of those things where you can never get too big. Today we are measuring them in TB. A few years ago in GB. Awhile before that in MB. Back in the apple ][ days it was in KB. You can pretty much see the trend, even if you can not predict the exact years.
I ordered my machine yesterday and the specs are WAY beyond what I would need now. Just as the specs on my 2007 machine then were out there but now it is almost pokey for intensive tasks.
As a comparison to your question though I went for Apple's 3 TB hard drive. Then I added a 480 GB SSD from OWC as an external (512 - overprovisioning), a 4 TB thunderbolt drive for timemachine, and will do full backups on 4 TB drives using a voyager q.