great composition if you had it on a tripod and sharp it would be a cracker. In processing I would be tempted to add a vinignette to really make the waterfall pop
Definitely Glencar… Tripod is a must… even if you are shooting “regular” shots with no intention to do the long exposures get a tripod and remote release… this way you will slow down to think about the composition to position camera and tripod correctly, you will eliminate vibrations, and by using remote release (cable release will do as well) you are eliminating possibility to move camera while pressing the release button – all that will contribute to sharper shots and slower shutter speeds… good luck