On a Mac the Expose features such as ability to customize your screen rather than have to deal with fixed real estate plus additional virtual desktops are also highly notable in that regard. There are definitely advantages of having additional physical screens over the window management approach, but also vice versa too. I would say just try it, but note that it does take quite a bit of getting used to, as too in a sense does multiple monitors especially if trying to use different windows from the same app - browser - on different ones.

Also if cost is no factor at all, instead of multiple monitors you can have large nice screen + laptop, for the ultimate portability. There too there are advantages and disadvantages both - e.g. while working on one the other will fall asleep, if the nice screen is a separate computer rather than mere monitor.

To someone wondering what to try: something will appeal to you - listen to your inner voice and let it guide you! If you are wrong, you still learn from the experience;-).

After having tried most standard configurations at various jobs and home (never a third monitor though, I prefer the ease and simplicity of a single large monitor. Everything is a few keystrokes away but I tend not to need to see all things at the same time. Sometimes, extremely rarely, it does seem too constraining, but not enough to justify the additional cost of a second monitor (not just money but setup and my attention time), and this works well enough for me. Others will similarly do what works best for them in turn.