I've been improving the sound quality of my stereo hi fi and I'm unsure how to spend the remaining ~£80 budget. The system is mainly used for DAB and playing flac/mp3 files through phone/laptop with TV getting some use for PS3/films/sport. So far I've simply replaced some old Eltax speakers with some Tannoy V1s and invested in some QED XT Evolution speaker cable to replace the bog standard stuff. These are paired with my Cambridge A1 and Cambridge DAB300. How would I be best spending the remaining to get the best improvement? I don't know whether to invest in a couple of DACs (one USB to connect my phone/laptop to play FLAC files and one for TV optical out - looking at FiiO D03K and FiiO E7/Behringer UCA202) and any change to get a proper interconnect cable for the DAB. The other option is to simply sell the Cambridge A1 for around £30 and just upgrade the amp to a ~£100 one, and leave everything else as is. Possibly a NAD C350? I don't know which would give me the best improvement though?