Air Stone And Pump?

I've heard that air pumps can be noisy. Rena is the brand I've read is the best on noise grounds. Putting the pump on a towel or suspending it somehow usually reduces the noise, which is mainly cause by it vibrating on a solid surface.

Does the new filter not move the water surface at all?

We usually say that as you can see the water is moving, that's all. It is possible to keep fish in a tank with no water movement, but you can't keep as many fish in a tank like that - though a tank without water movement wouldn't be filtered either.
Gas exchange takes place where the water meets the air. Oxygen dissolves from the air and carbon dioxide breathed out by the fish leaves the water and goes into the air. If the water surface is still, the same water is in contact with the air all the time and the carbon dioxide has to move through the water to get to the surface, and the oxygen has to move down into the water to get to the fish. If the water circulates in the tank, the surface layer is constantly changing; the oxygen rich old layer is pushed under and the carbon dioxide rich underneath water is brought to the surface. This enables gas exchange to take place much faster and the tank can support more fish. This is one reason an overstocked tank suffers more quickly during a power cut.
So long as your new filter moves the water round the tank, it will be OK. Causing ripples may show the water is moving a bit more vigorously, but the main thing is that the water is moving round the tank. When you feed the fish, what to the bits of food do? If they move along the surface it shows the water is moving. 

If you are still worried, don't stock to the max 

Something just occurred to me while I was out at the optician - are the inlet and outlet pipes close togther or well separated? If they are very close, the water will go straight out of one pipe and into the other. If the two are a distance apart it will create water flow between them.