Haha, you cracked me up :) I'm not sure of the figures for processing the packed version, however this would need to be done for every page of your site that the user visits because the JS is cached in packed form. This means that whatever the overhead is for unpacking the packed version, the delay is applied to every page of your site. For this reason, even if the regular minified (non-packed) version was even a bit larger than it is, I'd definitely lean towards using it as this can be cached once and used without delay on all subsequent pages.
Joel Birch - member of the good-looking, cool, super-duper web optimisation team. :D
