Question about best query software

Hi 

Could you propose some query tool/software which you test, use and it's
working properly and fast (in building query and executing).
My requirements:
- managing - by Web browser or by software itself;
- browsing/changing reports (rather) (by end-user) - by Web browser;
- ad-hoc query;
- scheduled query;
- sending result's reports also by e-mail;
- saving reports in xls format;
- saving result in phisical fields (but it is not very important);
- renaming file's/field's name with user friendly names;
- it should be user friendly at all :-)
- query building with many SQL functions (like CAST), maybe with own/new
functions;
- retriving data also from MS SQL Database;
- retriving data also from Excel files;
- price - CFO firendly :-)

Thanks for any help

Regards

Tomasz Skorza