But none of that will have the task bar along the bottom of both screens
Do you really plan on having that many open programs? The task bar will shrink icons to fit more if needed just like XP does. I have dual 22" widescreens at work with an extended desktop and I never fill up the taskbar even though it's on just one monitor.
edit: Fail for not reading the OP well for me ... @op
As people are saying there are a lot of details to consider:
What video card do you have?
What ports does it have?
What ports do your monitors have?
What do you want your configuration to do (eyefinity gaming, basic setup, etc)?
The GPU *and* drivers you have will dictate to some degree what extra options you have for multi monitor, and sometimes they can really mess up even the 'basic' mode (I've seen some really odd stuff from older cards from nvidia). Usually the option is called spanning (it may al, but it does create some side effects, because Windows will only put the start bar on one display.
You can either treat both monitors as a single monitor, (I find this annoying, because then a maximized window will span both screens, fine for gaming, really annoying for web-browsers and other productivity apps)
Personally, for dual monitor setups, try putting the taskbar on the right/left (outside) edge of the secondary monitor, giving it a bit of extra real estate (make it wider). From there, you can set use small icons, with labels, and never combine tasks, I can have about 20 windows open on my 1280x1024 secondary monitor without filling the task bar, you also get the date and day of the week added to the clock, and plenty of room to show all notifications.
Usually vertical real estate is much more valuable on a "web page" monitor anyway. I find this awesome for both my personal gaming muchine and my work computer (both are multi monitor) once you get used to it.