I believe many of the good ones are taken...but also
Even if you are in a "right circle", oftentimes, the guys are too shy, too pre-occupied and too busy waiting on God to point His magic laser beam down on "the one" that they don't bother putting themselves out there as much. Because "why bother dating to figure out what kind of person you can truly love, tolerate, have fun with, walk alongside the Lord with, etc. when God is going to plant her right in front of your face?"
Sorry, I know that was somewhat of an exaggeration, but when I've been in the right circles and put myself out there, many of the single guys in the same circles were that way.
Don't get me wrong, I do believe in God's perfect timing and that He does have someone out there that He is preparing me for and whom I am being prepared for as well, BUT if we don't allow ourselves the experience of dating b/c of whatever reasons, we are taking away the opportunity to get to know ourselves better.
That's what I feel is the bigger issue: Not that good girls and good guys don't exist, but that there are personal and societal barriers that are keeping us from being vulnerable and open with the opposite sex.
It's like we aren't even trying! And I say "we" b/c it's not just men who aren't taking an initiative, but us young women too. We have to put ourselves out there just as much if not more if we want to have the opportunity to experience a healthy, Godly relationship with a Christian man.