Sorry guys, Twas a bit of a rushed post was it not?! lol...
The E17 will NOT be the source, I only use it currently as its the only amp i have capable of running the HD400's somewhat.
No as for Source etc I have a Cambridge Audio DacMagic 100 which is still relatively new.
Through this I run my cd player and my imac ( audirvana )
Music type that will be heard through these cans at least will be classical, blue grass, jazz etc...
But this amp Im looking for will also run future sets of cans :- Beyerdynamic Tesla T70's and Sennheiser HD600's.
Everything I own so far is single ended so no balanced outputs needed at the moment.
Budget I would say will be around £300 tops. For the amp. or Amp/Dac.
Hope that helps a little more...