For my spread omni setup I think my current DIY rig is the best I'm going to get for 1-2m spread with Naiant X-Xs and card/hyper center, they are light and can be used on tent pole sections or telescopic extensions. To my ear they sound good over a meter apart, open and bassy, around 1.5 with for a center mix. I noticed that even with small X-Xs, if I point them on axis the telescopic antennas will tend to twist in the heat. So the tent pole remedy is still very DIY with tightly wrapped tape and zip ties on a T-Bar. For CP-2 caps, which seem pretty directional to me, I think I would be fine with the Monfrotto bar's width using an Omni-Card or Omni-XY setup.
You make a good point about the 154's weight. On my Calumet stand, one kick to a leg and the top would be swaying until I stopped it. I like the idea of holes though, I can shed weight on aluminum tent poles by drilling out some of the mass. Thanks, I didn't think of that.
As far as two stands I tend to shy away from that. I'll setup by the board or low at stage lip/stage. I have a hard enough time keeping beer, feet, and hands off the gear to put another stand 3m+ away from me. I'd like too, but want to keep a low profile.
This is probably for another thread, but I have been experimenting with wide angled cards and stack hypers to try to get the same affect in an indoor setting. But it needs a lot post work to dial them in, not sure if its worth it yet.