I'm a big fan of James Hardi siding. With the new saw blades designed for cutting it, that part is now really easy. It nails on easily, it holds paint forever and it's bug proof, just about fire proof and it will never rot. It does have to go over something like OSB and then you need to use house wrap, but both are simple enough to do.
Smart Siding is just a pre painted OSB. It looks nice when it's up, but if you don't seal the cut ends, it will absorb water and swell up on you. How long it lasts is still a question that hasn't been proven. Cost wise, it's not much cheaper then Hardi, but it's lighter and easier to install.
Metal is always good, but you have to like the look of it. Once you get the hang of it, it's very fast and easy to install. Best of all, once you hang it, you never have to mess with it again!!!!
T1-11 is a pain because of all the maintenance it requires. Some like the way it looks, but to me, it's cheap and temporarly looking.
Avoid anything based on paper or a paper fiber. That stuff is by far the worse of the worse!!!!
Eddie