Quick heads up to those who took the time to offer solutions to my problem - I solved it and
ditched Newzbin. I spent a lot of time (and I mean a lot of time)
today trying various combinations of filters, both on AltBinz and in Newzbin, but just couldn't get anything to work to my satisfaction. Eventually following some searching here I tracked down a post in which Hecks suggested NZBs(dot)ORG
http://www.nzbs.org/ as a more suitable site for RSS downloading.
Taking his advice I registered and 3 clicks later, I'm now able to filter the RSS feed to my requirements.
My research and testing leads me to understand that in order to use Newzbin, any filter has to mirror exactly the wording of the Report heading (eg: South Park - 13x07 - Fatbeard; filter would have to read *South Park - 13*) - as these don't contain Group release names or container types any filters originally suggested by me and the subsequent options provied by other posters were, in effect, rendered useless. Similarily any denials are limited and rendered pointless if you want to use file information (eg: DVD, svcd, hr.hdtv etc) as the Report header's contain none.
With NZBs(dot)ORG I can now quite happily filter all my shows, with the correct release groups and not have to worry (I don't think) about downloading unrequired files.
Sorry for the long post. Hope it makes sense and that others in a similar position don't need to learn the hard way as I had today. Thanks again for all your help.