Re: Aperture Web Gallery's
Hmm, I gave up on Aperture and use Lightroom (not for Web functionality as it doesn;t have any) but in relation to your questions, I am fairly sure that you can't create a gallery with full sized images in Aperture (happy to be corrected). Don't know on the second question.
It was that sort of thing that led me to give up on Aperture, use Lightroom for editing and keywording and use a paid for photographers web site to present (e.g. theimagefile.com)