ok, i just bought the CDA-7893, and it is AWESOME. maybe it's just me, but i hear everybody saying it's hard to tune it right, but it sounds awesome and i barely tuned it. anyways, i bought it at my local car shop for $316.94, installed free. it's got a bass tuner, and a separate sub tuner which is awesome. i would highly recommend this to anybody who has the money, plus it's XM ready!