Philips Fidelio L1/00

[Praelatus]

Just got these and I'm not sure whether I could improve them by getting an amp of some sort.
Any suggestions?

Thanks for any and all advice.

 

[Praelatus]

Found cords, remaining budget is about $77.

Only need to get a headphone amp now.
Suggestions?

 

[Praelatus]

Considering the FiiO E11.
Is it really going to make a difference?