I bench with a fairly wide grip (middle finger on the rings) and I don't have any shoulder troubles. A few years ago I benched with a narrower grip and my shoulders hurt when I benched. I've made a couple other form changes (arch, tucking shoulders, 'sitting' the weight on my lats) that have contributed to my lack of shoulder pain... I don't think grip width is the main culprit.
With that said, if you want to move more weight I would keep a wide grip. Make sure you hammer your pecs, lats, and upper back to help your strength off the bottom. The lockout will be slightly easier at the top with a wider grip and slightly less ROM, but close grip bench presses and board presses are great to throw in to help your triceps strength.