I just purchased 2 Blue Package (9 games) tickets, and the customer service representative provided me a very helpful tool. This 3D Interactive view of the stadium allows you to view the sight line from any row in the stadium.

I remember I sat in Section 116 in about row 5 for the Rapids vs. Everton game, and about half the field was only viewable through the net. So for these tickets I chose to head up to row 16.

If you are thinking about purchasing tickets, check out the 3d map first!