If low noise is critical, I'd go with the manual miter box. I've got a
Craftsman that has done a wonderful job. It has a wooden base that I
modified slightly and will clamp tightly in a Workmate bench. It has a
"captive" blade so that once set, even a monkey could make precise cuts.
Something like:
http://www.sears.com/sr/javasr/product.do?
BV_UseBVCookie=Yes&vertical=TOOL&pid=00936343000&s ubcat=Miter+Boxes

(sorry about long url, it's a Craftsman Full Range Compounding Miter Box,
Sears item #00936343000 Mfr. model #36343 )