To expand on what ethereal wrote which is spot on, for me the question was do you want to have that lower performance in some games or is it worth the ~$20 to get the 3570K? Or whatever ~$200+ chip Intel has out now. I went with the 3570K because I didn't want to have slow downs in any game. I wanted the fastest/best, and it was worth it to me to spend the extra $20 to get the 3570K. As bigtroll mentioned however asking about one part might not be the best. Hard to suggest parts when you can't see the whole picture.
Edit: Here are a few games where the 8350 has trouble keeping up.
And yet other times it has no problems.
Sometimes it does fine, as good as what Intel has. Other times, as ethereal said, it the difference is rather large. (what is that, 1/4th to 1/3rd less? 25-33% lower?)