Either of them should work fine. As far as the voltage and temp ratings go, you'll want to use the existing ratings as minimums. In other words, you can use a cap thats rated for 10,16,25,35, etc. volts if you want to. Just don't go under the 10v rating of the original cap. Same goes for the temp rating, just dont go under 105 if that's what your original is rated for. The higher the temp rating, the longer life expectancy, up to a point. Of course with a variance in voltage/temp ratings comes an increase in physical size.

A 4700uF cap is very common and can be found in most electronics supply shops. The 5600uF is not as common and that's probably why novak recommends them. That's good marketing. Pay close attention to the polarity when you're installing your new component, reversing it can easily damage the new cap.

good luck.