I do a lot of work with EXCEL but usually only use basic editing. I spend way too much time trying to keep Excel from reformating text or changing values I don't want changed.
I have been looking for a flat file editor that would edit Excel spreadsheets from .csv or .tsv files. I have been looking quite a while without much success.
So far Ron's Editor looks great. It formats and edits in a format that looks like Excel, but it doesn't try to do all sorts of unnatural things to the text I enter.
This seems to be a great editor at a reasonable price.