Agree with WhiteDevil about the Danner pumps, and the Model 2. Good pumps.
Another option though would be Lifegard Aquatics "Quiet One" pumps. They're a little cheaper, but still very good quality. Depending on how confident you are on that "no more than four feet above the level of the reservoir", you could go with a...
Quiet One model 800 pump; at 4' head height it will put out 36 gal
/hr. If you're a bit over 4' of "lift" on your water, that might be cutting it close because that model's maximum head is 4.37 feet. At that height, you won't get any flow.
Maybe a better choice would be the Quiet One model 1200; at 4' head height it pumps 175 gal
/hr. As WhiteDevil mentioned, putting a valve at the outlet will allow you to throttle down the flow to whatever you want. Probably a good idea no matter what pump you go with - it's nearly impossible to match a pump to your exact requirements.
You can get the Quiet One (as well as the Danner pumps) here:
Lifegard Aquatics Quiet One Aquarium Water Pump
...and here's a link to the flow curves for the Lifegard pumps...