Any Recommended XSL integrated development environment

Hi,

    Im evaluating a range of xsl development environments. I currently
use a combination of VIM an XT. Im considering products including
cooktop, xmlspy, whitehill xsl composer, activestate komodo and emacs
plugins. Any opinions on these or other XSL IDE's preferably with
debugging features?
Also can anyone point me to an MSXML 3.0 command line utility that
allows me to run xsl and
xml using msxml without having to use a third party IDE environment?

thanks,

:) Ben


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