While I cant vouch for many of the newer tents listed, I'm a firm believer in both the Todd and Tegraltex products. I've had an Eldorado and an ID Salathe bivy for quite a while, and while they are both very different types of equipment, they both manage moisture extraordinarily well. I especially like the "fuzzy" surface on them, because it is specifically there to do the following:
1) Increase the surface area of the fabric to provide more room for the condensation
2) wicks and spreads out the moisture once it condenses (like a paper towel)
3) once the moisture has spread, it raises the possibility that it will eventually evaporate once the dew point is passed
On the Eldorado, having two doors is especially nice, for both ventilation and a second way out. Keep in mind with any of the "breathable" fabrics: once the temperature and the relative humidity are properly aligned and the air reaches it's dew point, the breathable surface is no longer "breathing" since the vapor is fully saturated and will condense on any surface. In my opinion, Todd/Tegraltex are more than just a fabric, they are a vapor/moisture management system. If you are in cold weather with any reasonable amount of humidity in the outside air, this point will be reached very quickly regardless of the material of your tent.
I am sure Event is a great fabric, and I understand it to be quite vapor permeable, but I don't know if or how it actually manages moisture. Furthermore, I suspect it may not be as durable as Todd/Tegraltex. On the other hand, Event is much lighter and that may be more worth it to you. But if you suspect that your life is essentially on the line every time you pitch this tent, what tent do you see yourself feeling more secure in?
As far as your decision process goes, given that you are seeking a fairly specific piece of equipment, I wouldn't try to get something for all purposes. In other words, don't purchase and carry a 2 person tent around with you if it will be just yourself for 90 percent of the time. If at all possible "don't let the tail wag the dog". In the architectural world that I live in, it is important to know when I am to design for just the norm, and not design for the exception to the norm. I believe it is natural for us to try to get the tool that can do everything, but in reality this tends to result in having a tool that does a lot, but marginally well.
hope this helps...