I would say it depends on the situations you'll be using it in. Mine gets used most in college, where I have to save work to it at the end of the lesson, when the faster I get out, the sooner I eat. So speed is most welcome.
Also if you'll be moving large files with it, you wont want to be sat for 30/40 minutes watching it move. If youre going to be moving word docs and pictures with it I wouldn't go smashing open the piggybank for something like this.