Top of the pops as far as I am concerned is the Eschenbach 1580-63: Illuminated Stand Magnifier.
This magnifier is my all time favourite magnifier it is the workhorse of my equipment list. No magnifier is perfect but this one works well for many people in the early stage of MD. The size of the lens gives a good field of view, with reasonable magnification. The housing lets you rest it on the page for easy viewing, it also sets it at the right focusing distance, (assuming you are wearing your reading glasses).
The light is clear from the LED bulb, which also gives you long life on the batteries. All round this is a winner of a magnifier.