I greatly favor high-capacity cards because they act as an accumulative backup for my field work (as redundancy to laptop download+backup, for which I use an OWC Envoy Pro EX).
The Lexar 128GB CompactFlash and Lexar 128GB SDXC cards are highly appealing on a speed+capacity+price basis. Even if the goal is not photography, they make for an interesting and extremely compact storage medium. SDXC cards insert directly into the slot on the MacBook Pro, and both types of cards can be read in a card reader like the Lexar Professional USB 3.0 Dual-Slot Reader.
For someone traveling and looking for compactness, having a 128GB or 256GB storage card in a camera allows for an awful lot of photos (even in RAW) and/or video footage.
What caught my eye was a 2-pack Lexar 128GB SDXC 1000X cards for only $126 with free expedited shipping.
Even more appealing for those needing the capacity, see the 2-pack Lexar 256GB SDXC 1000X cards for only $275 with free expedited shipping. In the past, the 256GB cards have carried a steep price per GB premium, but the price per gigabyte now is only marginally higher than the 128GB cards.