Certain Work Excel Attachments Don't Open

I have come to realize since our company moved to the Android platform of the Razr M that some of the excels that get sent out to us don't open with apps I've downloaded. I've tried Documents to Go, Office Suite Viewer 7, and Quick Office Viewer (some worked but treated differently and when it opened it was all gibberish). Now I know there are professional versions but I want to know that this will work before I buy it. Any Suggestions, Fixes out there? I believe my company uses certain formats when they send it out which causes this issue but is there any fixes for it besides getting the formats changed.