Hi everyone. i am new to hi fi and have just bought a cambridge audio 651a amp with a pair of tannoy mercury v4s and have to say that all the reviews i have seen on here have been really good in getting me to choose which amp and speakers i wanted to get. The main thing i need advice with is, all my music is on my computer so obv i connected my comp via usb, to use the amps dac, im thinking about gettin a arcam rdac or dac magic 100 instead of using the amps dac, would i notice a great improvement in the sound quality by gettin the dac, or is it not viable to spend extra cash on something im not goin to really notice. soz for the noobish question. ps: have got the software to convert tracks to 24bit 192khz.