Are you in the USA or Canada?
The reason I ask is:
( I know, you are a broke student, but if you could cut out the coffees or do some Caricatures on campus ) For $20 more I would definitely recommend the NExT. Plus in 
& 
- Free shipping* for entire order if you buy the NExT!
Outside of & with NExT in order, free shipping if over $150
So really it is 
$20 extra 
whatever you would have spent on shipping!
BUT in saying that, if you really want to be,
They really would be tiny, which brings me to your next option to consider
the xDF2 DESFire EV2 8kB NFC
It will do the same as the xNT but it is 8kB vs the xNT 886 bytes, so much more storage…
Here is a visual representation
Buuuuttt this is $139
I’m not actually trying to upsell you, I just want to make sure you jump in “Fully informed”
If you got the xDF2 and NO xLED, you again would be paying an extra $20 (no free shipping) but a much more capable device.
But if you really want the xLED ( I get it, its Blinky )
Oh, by the way, Nothing at all wrong with your decision for the xNT, its a great product, If thats what you choose, it is still a great Choice 
Food for thought 
Bon Appétit