Removing Duplicates- available tools not capturing all of them.

Kelli, the two duplicate detection tools use different criteria so the results are not going to be the same.  The db view criteria is overlay broad, IMHO, so I'd start with the web view which I've found provides better results.  I wouldn't freak out about finding other duplicates -- no duplicate tool is going to find them all.  I always focus on the duplicates that are causing problems, such as duplicates in mailings, and worry less about old duplicates that don't affect day-to-day work.  You can't change the criteria of either tool.  I don't think Query is going to help.  You could export data and look for commonalities yourself, like sorting by address, but I've rarely found that necessary.  MergeOmatic is an excellent tool but yes, as a third-party tool it comes at a cost.  I'd say either just use the tools you've got and don't stress about other duplicates, or if the other duplicates are a big enough deal, then that "big deal" should justify spending the money for MergeOmatic.  Note that BB has a "mass merge" plug-in that new NXT customers get to use for 90 days -- you might be able to get BB to let you use it for a few months and/or buy it.  Zeidman Development also has a tool like MergeOmatic -- see it here:  The Mergician – Zeidman Development -- and usually their products are cheaper than Omatic's, so check that out, too.