I need to get four new 6.5" speakers for my new boat and wanted to know if anyone had advice on where to get them at a good price. I have a 250 watt 4 way amp so I need something a little better than the cheapie ones I have now (50 watt max). Also, is there a big sound quality difference between dual cone and coaxial (2 way) speakers?<br /><br />Thanks in advance for the help.