Is my fantasy football team good?

It's pretty decent. I'm not sure how many teams are in your league, but it doesn't look bad. My only concern for you is at the WR position. Vincent Jackson and Santonio Holmes will serve suspensions and Dez Bryant is injured and may not be ready for the season opener. I do like Randy Moss and Malcolm Floyd. Moss always puts up good numbers (and probably more this year since Welker isn't 100%) and Floyd is a legitimate sleeper and will put up good numbers as well. I would drop Buehler and pick up another WR. You can try a trade too if that's possible.