Options for mass conversion of MS Word and PDF to TIFF

Exploring options for mass conversion of MS Word docs and PDF docs to TIFF. Volume of about 700 docs per month expected and would like to avoid one-at-a-time conversion using “printer” drivers. Have seen offerings by Snowbound (SnowBatch) and ImageMaker (Universal Document Conversion Server) and would appreciate feedback on these products as well as suggestions of other possible solutions.