Yes it looks like a good deal but you do not know how will it sound like with your phones. What headphones do you have and how do you plan to listen to them? At work/home - desk/living room/bed room? What headphone(s) will you be using them with?
I do not know where you are located but I pair Hifiman 400i, 500, 560 with ifi-audio iDSD Micro and Audeze LCD-XC with Calyx M digital audio player and anyone who heard it - were wowed. Both these setups are portable and will drive most headphones out there ...
note: I am dealer for the above products and I would be happy to arrange an in home audition for you.
I think it would be fun to try this amp ... but having done this buy and sell so many times over years - I am merely pointing towards practicality - high price to performance factor and proven track record. Of course then there is a whole real estate thing on desktop.