I spent quite a bit of time looking around. I found that microscope.com is an extremely reputable company. Very knowledgeable about everything, extremely helpful. I would say that it isn't just procuring the microscope, it is also the company that backs it. Some companies are difficult to reach secondarily. While this isn't a problem when they're taking your order, it becomes a major issue if you have a problem or need to get replacement parts... or heaven forbid warranty work!
In addition, you might consider a binocular microscope -- Easier on the eyes.
My suggestion? Since you're already looking at an Omano, house brand of microscope.com, write down a list of questions and call them. They will easily answer all of your questions and steer you in the right direction.