shortening a scraping door,

Recommend a Bosch power planer for that. Leaves a nice clean bottom edge
without splinters and hassles from circular saws and the like.

Would Craftsman be a good brand to look at for this ?

Great hand tools, but a mixed bag in electrics. Check Consumer Reports for some
ideas on what power tools are the better quality. Harbor Freight, for example,
sells throw away quality that will help you get started and not feel too much
pain when your skill and project size dictates an upgrade to the good stuff.
HTH

Joe