maybe you got bad cables. PC world did a test and said the monoprice were exactly the same, if not better in some tests. i've compared both too. i can't tell the difference, both looked great, one simply cost me 65 bucks less. monster has good speaker wire. that's it. any of their digital cables are no different than any other digital cable with equal specs.
2005 Imola Red 330Ci ZHP- SOLD
2006 Sebring Silver S2000- SOLD :(
2007 Silver Gray M Coupe- SOLD :'(