Just me that has 15 or so OKI B4600n printers dotted around in IT Suites and hasn't ever had a single problem with them......
Drivers are fine, they've never lost settings, they are robust and easy to manage.....
We even have a few 4350's that are approaching 7 or 8 years old and are still battling on without issue.....
The toners for the 4600 are about £70 for the high capacity genuine but we use Silicon Alley and their inkwell system so we don't pay for what is in stock only what we use. I don't think the cost is particularly high. Oki support is good and they re a fairly easy printer to do basic fixes on yourself.
Not uite sure why everyone else is having so many issues, I must be the exception rather than the rule.......lucky me!!! *touch wood*