new to tuners

i've cobbled together a system for the office, using an integrated (nad c352) that doesn't have a built in tuner. i've never bought a separate tuner before, and know nothing about how much to spend, how important it is, what the issues to pay attention to are, etc. the office system is a denon dcm-360 cd player, the nad c352, and energy c6 speakers. cheap monster and straightwire cables. what do you spend on a tuner for a system like that, and what makes / models might do the trick? it's mostly just for talk radio, with occasional classical and rock stations. thanks. -dave