Upgrading the Cameras

I am an independent videographer, editor, photographer and musician who has different events that I document all year round.  Some have been in low lit clubs, others are outdoors or just maybe on the spur of the moment when the timing is right.  I currently am using consumer HD Camcorders which give a decent picture but would like to be able to upgrade to professional camcorders with 3 elements instead of just one which will give me the highest possible quality of video to work with.  Higher quality videos will help me bring in more business along with more happy customers who already are familiar with my work. Please help me to achieve this goal of being able to purchase 2 pro camcorders (plus accessories such as extra batteries, memory cards, cases etc) so that I may expand my small business into a full time production facility.