Is there much of a difference between these car speakers. The POLK site rates both at 4.5 stars? I just got another car and was getting ready to buy 4speakers as soon as my new radio comes in. I can buy the MOMO's on ebay for $125/pr while the db's are$110/pr (Circut City wants $149/pair for the db's.) Sounds like a no-brainer to me but was just curious about the difference in sound?