Really- they are all the same. For the majority of us, we seem to be in agreement that the difference between the big name brands have to do with customer service, as well as the doodads offered with the bike.
These new bikes you're talking about... buyer beware. They are probably about the same in terms of being lightweight spinner bikes. If you're looking for bikes with staying power, you'll have to start shelling out the big bucks- cycleops, revmaster, schwinn, startrac... those are the big name ones that will probably last longer, give smoother rides, etc. Then once you start talking about those big name ones, it becomes a matter of which ones have better customer service, offer better equipment with their spin bikes, etc. At the top of the list of those, I'd consider cycleops and revmaster. Revmaster is cheaper and doesn't offer power, though it offers all the other readouts, but is a very good, solid bike. Cycleops is top of the line and offers power as well as the other readouts.
Those ones you mentioned... meh. They're all going to be low end, mass marketed pieces of junk. They may last a year or so, but if you just want the bare minimum to go with, go with the cheaper bikes.
Oh- and the bikes are usually made for people between 4' 11" and 6'4", though when you're getting to your height, they are less so. If you went with a Revmaster, they have extra tall handlebars and seats for those over 6' you could buy extra. Revmaster thinks of everything (made by Stairmaster, a division of Nautilus).
Koffee