If someone is telling you RF is one of the best brands they must not have had much expreience at all or they are just trying to unload there stock. Listen to some eclipses, alpines, CDT, infinities for that matter...quality in the car audio world comes at a price though. RF stuff is decent for the everyday lsitenener but if you want true quality you gotta look elsewhere...
As for their amps...well...i wouldn't say anything terrible about them. I prefer the likes of Zapco, JL, JBL myself. If used to power their speakers they are fine...but once again if you want quality gotta go with qaulity 🙂