Is it worth me getting an headphone amp/DAC for my Grado SR80's?

[hoot37]

I have a pair of Grado SR80i's which are easy to drive and dont really require an amp, but I'm not entirely impressed by the output from from laptop or my phone, but my fathers PC which has an expensive Asus Xonar card makes them sound great, so I was wondering if it was worth me spending £60 on a Fiio E10 which appears to be the best I can get for my money. Can anyone help me out here?

[Darkimmortal]

If you have a phone that is compatible with Voodoo Sound, get it

[hoot37]

I haven't got a phone compatible with it, I'm just wondering if I should go for the Fiio E10?