First off Merry christmas to everyone,I have a chance to buy either a Sony TC-K677ES or a Aiwa AD-F810 cassette deck,both are 3 Head Closed loop dual capstan decks with almost the exact same features and both were made in 1991 and both are in mint condition and are the exact same price.My question is which one would be the better deck,which should i spend my money on?I want to know which one will hold up the best and which one is built the best?Any help in helping me make a decision will be greatly appreciated..Peace to all,Keith H.