For gaming and browsing, then I strongly suggest a good single monitor than two smaller ones. This is because you wont be playing games over two monitors (it really only works with 1 or 3, otherwise your center point would be where the two join), and a good 25-27" monitor would give a much better experience that a cheaper smaller 22" monitor.
Dual monitors are great for multi-tasking, and especially useful when video/photo editing, accounting work, etc, but it wouldn't be worth diminishing the experience of your main uses for improved experience in things you wont do regularly.
As for you monitor choice, theres better you could get. What is your max budget?