It will be the same height. I guess I expected more flow from the spray bar. The hold closer to the end have more flow than the holes at the start of the spray bar. So flow will still be the same then. What about taking the guard off the end of the intake?if the flow isnt restricted in any way other than head hight, it should remain the same.
surface agitation will depend how you have your return pointing, if it points down from under the water, it should not affect the surface.
you can get a variety of water returns at a SW fish shop in the plumbing section, you will need to know the inside diameter of your hose.