C64, for you my friend, i highly recommend the cambridge audio azur 340A at £149 (or 340A SE as it has a front input for mp3/ipod but is £179). This amp has a headphone socket and is remote control.
Other people should just recommend C64 an amplifier FOR HIS NEEDS, which are clear. At the end of the day the A5 is a good amp for the price but does lack functionality and is also a design which must be at least ten years old.
Please C64 don't get too annoyed with the other posters on this thread but let us all know what you finally decided to buy. Good luck.
P.S. My Cambridge audio dacmagic 2 is excellent for connecting my pc as it has on optical, coaxial and analogue inputs so i currently have an optical cable running from my auzentech explosion (with upgraded dac's) to the dacmagic 2 and the mp3 files stored on my pc sound fantastic now.