Some additional thoughts, No...
It sounds as if you're planning to wear the all-wool tights and nothing else below, since you asked about the chamois.
You probably have an idea in mind already, but if you're still trying to decide, I would suggest getting the tights with the double-wool bottom and no chamoi, so you can wear them over cycling shorts, then peel them off done them as effort and temperatures vary during your rides. The shorts will have a chamois of their own, and it can be unpleasant riding on two of them -- too thick atop the saddle, and the pair can end up making a sort of wad of material that is uncomfortable to sit on.
As for bibs, I've found they can complicate "breaks naturelle", when you need to relieve yourself. Since most bibs are worn under jerseys (and jackets, if it is cold enough for bib-tights), all that has to come off to make operations possible -- cold, drafty, and extra loose clothing to deal with. For this reason, I find I don't wear my bib-tights as often as I'd thought, and instead use regular tights over shorts so things can come part more readily when needed for elimination.
One additional alternative is all-wool leg warmers. If your shorts are already wool and you just need extra warmth on the legs, this can be a really nice way to go, as the "sleeves" (legs) can be folded or rolled to fit in jersey pockets. I sometimes also use all-wool arm warmers with both my wool and synthetic jerseys for the same reasons and they really help. They can also store compactly in a rear jersey pocket.
It is astonishing how warm one can be for so little weight and bulk. I've been perfectly happy to ride in 15-25°F/-9 to-4°C weather if I'm working hard, wearing only a heavy wool jersey with wool arm warmers, wool shorts with wool leg warmers or wool tights, an uncoated wind jacket, and a pair of thin lycra tights over the bottoms to break the wind. A gilet (wind-vest) can warm the chest as effectively as a bib. Yes, more pieces to keep track of, but much more versatility in about the same overall bulk.
Kucharik has all-wool arm and leg warmers as well. Mine are Sergal, as I recall.
Just a few thoughts on a slightly different approach in the hope it might help.
Here is a nifty little tool to get some ideas on what garments are appropriate for a given weather state when cycling:
http://www.bicycling.com/whattowear?cm_mmc=Facebook-_-Bicycling-_-Content-Story-_-what-to-wearBest,
Dan.