I have a NVGS250 and was wondering what sort of external microphone would be good for it. The Sennheiser MKE 300 seems ok but I have heard that the Sennheiser K6/M66 is even better. Does anyone think the K6/M66 would be overkill for a camcorder like the NVGS250? Is there any other that anyone would recommend? Deos anyone know where the best deal for a K6/M66 is?