ive recently aquired a Denon PMA 700 V pre-main amp a denon DCD 1500 cd player a Hitachi D 900 single well cassette deck and a Kenwood KR 4400 receiver that im using as a tuner until i upgrade to the Marantz ST7001. which im pushing through a pair of KEF c-80 series speakers. the hitachi tape deck seems to possibly need a rebelting is it worth getting repaired or should i upgrade also im looking for a graphic equalizer any reccomendations