A trusted system is not the same for everyone. The tools, as we know, really do not matter. What does matter is to have a state of "mind like water". And to maintain to many complex tools, there's less time to be in that state, like David Allen says, sometimes you don't want to do anything! So for me, i want to keep the tools as simple as possible and doing it all in one tool like NirvanaHQ while using the Areas for @work and @home, keeps life nicely integrated as DA recommends. Again, for me. I understand the user who loves to have as many features as possible and play around with them, the tools should also be fun to use I guess, i get that.
