I agree with your point there. Not all secular music is bad. I love listening to Duran Duran, but I also get a good dosage of worship songs by attending church. If we were only to associate with only Christians, then we'll never able to get the word of Jesus out to our non-Christian friends. That's right. Salvation is not about good works but through faith.
I went through the same thing when I was looking for a fellowship at UCI. All the fellowships were really good. Different fellowships work well for different people. When I found Intervarsity Christian Fellowhip, I felt right at home. My faith grew tremendously.