SanDisk Mobile Ultra 64GB microSDXC Class 6 Memory Card $80 at Adorama

The clown car of memory sticks

Some sites are claiming that these work fine in the latest Android phones but no promises. I suggest googling before spending any money.

http://pocketnow.com/android/how-well-are-android-phones-handling-64gb-sdxc-memory-cards

You would think that 32GB would be enough but I have already had to decide on what stuff to keep and what to throw away. Between ROM and app backups, pics, videos, movies and mp3s, my card gets full up.

@techsupport I agree they fill up fast. I have dozens of very high bitrate MP3 albums and a half dozen audiobooks, and lots of photos in my phone. I'm going to try one of these in my next phone, I'm just waiting for the round of quad-core phones to come out late spring-early summer.

Instructions per clock makes a much greater difference (assuming there's still a lot of room to improve, which on ARM there is) in processor speed than throwing a couple more lower IPC cores at a problem. The latter requires more developer intervention to take advantage of the spare cores and even then it's unlikely those extra cores get as well utilized if you simply had even one or two wider, more efficient cores (you can wider the architecture, but you still need to feed the beast with an improved memory hierarchy).

That said, the dual core Snapdragon S4 and ARM A15 architectures should deliver on that. Info on the S4:
http://www.anandtech.com/show/5589/qualcomm-announces-snapdragon-s4-pro-krait-with-adreno-320

On topic, the nicest thing about these flash cards from SanDisk is their speed rating; it's been my experience that SanDisk is the least likely to embellish the class rating on their products.