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The base Retina MBP model provides almost 1 1/2 more hours of battery endurance than the 2.6 GHz system.

Where are you getting this statistic from? I have been pretty obsessively keeping up with the forums waiting for my BTO to ship and this is the first I've heard of a 1.5 hour difference in runtimes.
 
Not really. With how big SD cards and external storage options are getting, going down to 256GB wasn't that much of an issue for me. The iCloud helps too. Sure, I might not be able to keep every single TV show I ever bought in one drive anymore, but at the same time, the huge increase in speed makes up for it.
 
I migrated from a 1 TB drive in an iMac to a 256 GB rMBP. I'm happy with the decision. It took some deliberate steps. I used to store over 150 GB of content purchased from iTunes (movies, tv shows, and music) but now I use iCloud to download it on-demand. I moved all of my personal documents to iCloud, too. I keep all my work in offsite version control, and just download the bits I need at a time. Everything's backed up to a Time Capsule and Backblaze. It feels kind of liberating to store so much less data on my primary machine. It's not for everyone (it requires a fast, unlimited, and reliable internet connection for sure) but for those for whom it works, it feels like magic.
 

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Use your SD card for some extra storage space for stuff that doesn't need very high speed memory like iTunes stuff. Use a micro SD card (like this 64 GB one)+ one of these and you can up your rMBP's storage by 25% for $90.
For faster storage if you want it you can up the class of your micro SD card.
That's a great idea. My own plan for my MBPR has my iTunes library off-loaded onto a separate USB drive, but as it's not an especially big library, it could quite easily live on an SD card. The Nifty project is very clever, and it's nice to see that people are recognising a good idea. Might have to get on the list :)

One thing that worries me, though, is how many rewrite cycles an SD card can support. To be fair, iTunes probably doesn't need to do that many relative to other apps, so it ought to be okay.

Has anyone actually got their iTunes working in this way, and if so how's that working out?
 
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Cool thanks for the info, interesting as I would have thought the 2.6 processor would ramp down when not under load bringing it to similar power usages as the 2.3.

Still though, the extra bit of battery life isn't outweighing the convenience of 512 internally for me.

And part of me feels that Engadget might have skewed the results, why? I don't know but those guys seem shady to me!
 
Cool thanks for the info, interesting as I would have thought the 2.6 processor would ramp down when not under load bringing it to similar power usages as the 2.3.

Still though, the extra bit of battery life isn't outweighing the convenience of 512 internally for me.

And part of me feels that Engadget might have skewed the results, why? I don't know but those guys seem shady to me!

You're kidding right?

If anything they're constantly on their knees for everything Apple
 
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