I bought the NVIDIA-Jetson-tx2-developer-kit to learn Linux on and use as a secondary computer for miscellaneous tasks. The kit has fulfilled my expectations completely. I was able to add a 256 gigabyte SSD drive (SATA-3) to it as following instruction from Jet-hacks on YouTube make that my primary drive, which helped speed boot-up time and read-write time.
I've had it less than a month but it is fast compared to my old Intel-Atom Dell computer.
Give it a try!