Upload & Sell: On
Yes, off-camera lighting is the next frontier for your portraits. I regard the Pocket Wizard Mini TT1, AC3, and three Flex TT5s, along with two softboxes and a good modifier for the third, plus a portable background, as absolutely essential for me being able to make high-quality portraits. A good camera and lens, yes, but no matter which of those you use, without the lighting you're still only going to be able to make snapshots. Well, that may be a bit much, since windows and reflectors can also be very good, but the lighting allows so much more control and flexibility.