exhaust suggestions

i have a 68 dart with 340 automatic..its a nice daily driver that i have tried to keep a original look and i plan to drive it daily..i am ready for exhaust system..i t has a performance cam with the la340 intake and factory hp exhaust manifolds.i have purchased tips and hangers and i need some idea on if i should buy a pipe kit or just take it to local muffler shop? and i need a set of mufflers that sound good but i can hear the radio and cruise ..any ideas appreciated