I have the A8s as well, but rarely pick them up now, I only use my jukebox at work, as I no longer commute on the tube, and there I use my bose QuietComfort2 headphones (which are superb!!).
The A8s are very good for their size, built so well! I did find them a bit painful at times though, but that is probably because the back of my ears are awkwardly shaped

(no, NOT like that picture posted above

).
The eShures have a very good reputation though, so it may be a case of going to the stores to have a listen, both are great phones, you should be happy with either.