Until I can get my empeg fixed I'm looking to buy a cheap headunit to get me by.

Am I right in thinking that if I have an empeg, and a 4 channel amp, I should be looking for a headunit with 4ch RCA outputs, or will 2ch suffice?

And I assume I should be able to just remove my sled and plug the headunit straight in - is this correct? Assuming the headunit has an ISO connector. What about the preouts? Anything else I need to worry about?

Anyone recommend a cheap as possible headunit, and a url to buy it from in the UK?