Yep. You should not be going for crossfire or SLI unless you already have an extremely powerful card and need more power than the best can give you. There are just too many issues, such as the fact that it only works in the games that happen to support crossfire / SLI.
That being said, why is a budget of $200 making you not get Nvidia? You could get a 650ti or a 660 for around that much. (Though maestro's suggestion is a great card.)
LOL 650ti on a $200 budget heck even the 660 is inferior to the 7850 which I might add the fastest is the powercolor PCS+ 7850 is under $200 and performes better than a GTX 570 and even 580