i dont have a source at the moment, and forgot to mention that there should be a matching cd player for the amp, and preferably a dab radio too.
i have seen the marantz 7001 which has this, has anyone got any opinions on this amp ?
First off dude, DAB radio is crap. Your better off listening to a Freeview STB/PVR thru ytour hifi amp than a DAB tuner, or even better spend £40 on Ebay for a FM Tuner, will blow DAB into the weeds.
So back to the amp, sounds like your looking for an all matching affair, to me one of the most interesting budget amps out recently is the Denon PMA1500AE £550 a raft of facilities and criminally underlooked due to being a Denon and built in Japan, ie not given the kudos in british hifi press.
After that buying new I would save your monies up for a Cambridge Audio 840, £750 probably the best thing to hit budget amps in a few years. A quick note on second hand : £500-650 will buy you these amps :
Nait5i, Sugden A21, Unico, Sony TAF777ES, Primare I20, Rotel 1060 And many more. A huge leap over the Marantz 7001 - if your dead set on the Marantz look at the 7002 KI.