Is Meditation And Concentration Mutually Exclusive?
It's should be the other way around. One needs concentration for meditation and one can't attain concentration without diligently meditate. It's also a common misconception that insight/vipassana and serenity/samatha are 2 mutually exclusive practices. Furthermore, insight and serenity by themselves are still not sufficient. Various other factors are also needed to make progress in meditation: observing the precepts, diets, surrounding environment, etc. For further details, please see Ven. Buddhadasa's  http://www.buddhanet.net/pdf_file/anapanasati.pdf and Ven. Nanamoli's http://www.urbandharma.org/pdf1/MindfulnessBreathing.pdf . Some introduction to meditation in general from Ven. Gunaratana's http://www.accesstoinsight.org/lib/authors/gunaratana/wheel351.html