i have a 250 watt per chanel sunfire amp with sunfire preamp. i currently have klipsch rf-3 speakers but they are unstable at high volumes. does anyone know which klipsch speaker i should be looking for? or maybe another brand altogether? id love a set of the rf-7's but they cost so much. does anyone know of another klipsch speaker that is more affordable but can handle the 250 wpc?