I normally remain silent when it comes to practice, however as you can all imagine my business all happens under powerful magnification. As a result I have several people that must have microscopes matched to them for our work. One thing I can tell you is just because a setup is great for one person does not mean it will even work for another.
Price and brand name have little to do with success in this matter although a quality lens is central to it.
I would advise you develop a thirst for testing…try everything available to you. Everyone’s eyes are different, when you hit the one for you, you’ll know it. The right one will pull your vision up to where you want it without effort. When you hit the right setup it will be easy to forget it’s there…And that’s the point, what you’re doing is delicate and tedious enough, no need to be distracted by the shortcomings of this piece of equipment.
My advice is try out everything you can. Reviews are good, but only YOUR eyes will tell the tale and this is one of the most important purchases you will make for your practice.