I'm in the same boat -- Sony M10 is due to be delivered on Monday and I'm trying to figure out which mics & battery box to buy. The reviews of the Sound Professionals line are stellar, but I'm guessing they wouldn't print any reviews on their own website that were really negative... the general consensus on TS.com seems to be that the Church Audio mics are a better choice, but I'm on a pretty tight budget and would like to stay under the $150 mark if possible. Thinking about the SP Cardioids and the mini battery box combo. Does anyone know if their small battery box gives the same results as the larger model?