Strongly disagree, Universe is my favorite Stargate. They got a lot of the great stuff from Stargate and managed to put it together with a lot of the great stuff in Battlestar Galactica.
OG Stargate was always about exploration and discoveries, something they eventually forgot on SG-1 and that Atlantis never really followed. If any one of the 3 is getting dropped it should be Atlantis, it's the least Stargatey of all of the Stargates.
Since you like time loops, there's a Stargate SG-1 episode about time loop as well, S04E06 Window of Opportunity, also one of my favorite episodes.