cannot edit much of the contents of excel files without discarding
some information from them. <<
First, I am not an "excel" person, so my info is incomplete.
If you use advanced features of excel (graphs, advanced functions, etc)
they will be editied out on sync.
That said, I have opened many excel files and have never encountered
this... i.e. if you use basic spreadsheets, you will have enough power
to do what you need.
If you have advanced needs, there are third party excel apps that give
you a complete solution.
note... when complex spreadsheets are synced from the pc and edited,
their sync back to the pc overwrites the advanced feature copy, so,
never sync the originals of word and excel files if they use advanced
desktop features.
Beverly Howard [MS MVP-Mobile Devices]