The Nevos are very powerful and can do the things you describe. Keep in mind that the S70 isn't actually in circulation yet, so the Q50 is your only option right now. You should decide the basic question of whether you prefer a more touchscreen-based remote (S70) or a more button-based one (Q50). Key differences between the Q50 and S70 are their screens, the S70's wi-fi, and how they implement some of the controls you mention. I really like it's additional transport buttons of the Q50, but it would make controlling things like your windows and blinds a little more cumbersome, as its z-wave functions are not universal yet.

Another consideration is whether you plan to do all the programming yourself or have an installer do it. Using an installer, you would be limited to what's available locally, and Nevos don't appear to be as common as, say, Pronto.