There are three major manufacturers of scopes in the American market: Zeiss, Global and Seiler. They are all good. You have to pick the one that best suits your needs. Seiler's product is very good and very competitively priced and can be purchased at a substantial saving over the other brands.
You can get an entry level one like the Seiler 202 starting around $6000. I preder the full service premium scope called the Revelation. Either way, using a scope will take you to a higher level of performance. Most of my users use 6 or 8x routinely for most of thier work and go to 10x or 13x for endo.
Since Seiler is so many thousands less expensive, Id rather use the thousands I save to purchase the accessories optical extenders, rotation device and imaging capability plus I like to have a monitor placed where the patient can see it when they are laying down in the patient chair. It is wonderful for patient commumication.
I also recommend that you get proper training on a scope. There are training centers specializing in this or you can have me come to your office to train you in your office, while using your own scope and staff while treating your own patients.
Good luck
Stefan Luger
Microscope Consultant and Hands-on Trainer
Microscope Sales and Service
www.dentalmicroscopy.com 410-977-2840