There was another Rush reference on FX's Archer during the latest episode Skin Game (Season 3, Episode 8) which aired last night (thanks to Eric at Power Windows for the heads up). Towards the beginning of the episode, Archer is accompanying Krieger to his lab to see a surprise. When they enter the room there's a large Neil Peart style drumkit in the middle of the room. The conversation proceeds as follows:
Archer: Wow. Amazing. You can play YYZ.
Kreiger: First of all - it's YY-Zed. And second of all - no, I can't get it. It's impossible.
Then in the first scene after the opening credits:
Krieger: (to Pam) How dare you fail to recognize my greatest accomplishment to date?
Pam:: What, you finally nailed YYZ?
Krieger It's Zed! And ... no - Neil Peart (Pert) stands alone...
The drum kit even has some lettering on it in the same style as the first Rush album (which I think says Thunder Dome). You can see a screenshot here. This makes the second reference on the show this season. Just a couple of months ago there was another reference on the mid-season premiere of the show. In that episode Dr. Krieger had updated the mural on his van to a Rush Hemispheres theme; the mural depicts Krieger as both the naked man and the man-in-the-hat from the Hemispheres cover with the text Krieger: Vanispheres on it (see the screenshot here). That reference was a follow-up of sorts to yet another reference that occurred on the season finale of season 2. In that episode Krieger's van had an Exit ... Stage Left-inspired mural.