I'll take that Indian nickel!I'm so used to single stage benchrest triggers I went all-in on the TT Diamond single stage AR triggers when they came out. I have some rifles I can't even think too hard about without them going off, so for me the overall habit of no finger on the trigger at all is more important than any benefit to a 2-stage.
If your lightest trigger is 3.5# then I think you should try a two-stage with as light a second stage as you can get, or a single stage set as close to 1# as possible, just to get a feel for them. Going lighter made a bigger difference in my shooting that I would think a change between single and double stage would. I don't go walking around the ranch in the dark with that light a trigger in a loaded rifle, but if I can set up on a tripod or in a stand it's fantastic to get that good of a feeling on shots.
Two super-nitpicky points that are fully my opinion: I like curved bow triggers and cartridge triggers. I do have a Geissele SSA-E and prefer the drop in cartridges, and I have one flat bow and prefer curved. I change out grips to line my finger up and IMO the bow makes for a more consistent placement, and it's probably all in my mind but a sealed trigger seems easier to take care of. This coming from someone who generally cleans out a lower with a can of brake cleaner. So about a wood nickel worth of adice there