After a lot of research I think I about to plump for a pair of AKG K550s to replace my Monster Turbine IEMS (found them to uncomfortable but liked the noise isolation with good sound quality yet a decent amount of bass which I have found have lacked in heaphones I have owned in the past).
However, I believe that these sound best with an amp and seen as though I'm willing to fork out on one I thought I would ask for some recommendations from you guys. Budget is around £100 (approx. $158 but obviously must be available in the UK) and I dont mind going second hand. I have been looking at the Fiio E11 or E17 as well as the E7 but I dont really know the difference and if they E7 and E17 are worth the extra money? Are there any other alternatives I should consider?
The source will be a iPhone 4 as well as a library computer which probably has the worst sound card known to man in it!
Any advice much appreciated.