Depends on where and maybe how long your travels are.
If, like me, you travel to all sorts of places, including the 'fourth world' -- then the Nexus 7 is suboptimal. Its lack of a microSD card slot reminds me of my first tablet - the original iPad. Beautiful thing it was -- except the only way to update or copy files was either by connecting to desktop (mothership) or over-the-air WIFI. Well, the first was impossible, and as for the second, WIFI could be darn hard to find in the third and fourth worlds. One of my travel PDF file got corrupted somehow -- and it would have been nice to just copy over from a backup card -- but no, in my case, I had to wing it until I finally got to a place with wifi -- then email the publisher to send me another copy. And then wait a day and then look for Wifi again...
When traveling, there are the apps I use:
o Skype (pay $30 a year and you can call US and Canada from anywhere in the world where you can find Wifi -- no time limit)
o PDF reader / Kindle -- for travel guidebooks, other reading
o Language translator