I thought SG1 died in its tracks at the end of this last season. It pretty much wrapped up most loose threads by finishing off the replicators and the System Lords and freeing the jaffa. I have not liked the track Atlantis is moving on, way too PC and sometimes too hokey.
SG1 is going to have new bad guys next season. As for Atlantis it is getting better. I still don't think it is going to last as long as SG1..