As big a fan of the show as i am, i agree its time it left Primetime at least.
Why not put it to rest for a year and then Show one episode a week from the start, Which would be popular amongst those who eithier didnt watch the show before but "discover" it and people who dont have them all on DVD/Video and so would have been unable to see the show for over a year.
Its like Only Fools and Horses in that it should never fully stop, it was too good of a show, but they should start bringing down how much they show.
So yeah, leave it for a year then re-introduce it at a time they have nothing better to show and show it once a week...Itl last about 2 years then as well
EDIT: Correction, at once a week it would last about 4 years.