The first trailer's available at Suprnova for the new series. It's about a minute long and features a peek or two at the sound recordings from the new shows.

Just had a look, looks great :) I've got S3 on DVD which is really funny, S2's funniest though imo :)

It's a close call between any of the seasons tbh. I picked up all three when they had the recent promotion on them :thumbsup: