I have just purchased some Beyerdynamic DT770 80 ohm Headphones and now need a good Amplifier to bring out their best and increase their volume. I listen to electronic dance from a Sansa Clip+ Portable Player. The Fiio E6 I tried was just about good enough, but I had to run it on nearly maximum volume. I am happy to spend up to about £120 and would prefer to use a Desktop amp, but I appreciate these can be expensive. Alternatively, a portable amp that can be charged via mains (not USB) whilst playing would be second best. Please be aware, I will not need to connect this to a PC, just my Sansa Clip. I would welcome any comments regarding a suitable amp that would fit these purposes., especially from those who use a similar setup with the same type of music preference.