I had an Epson CX11 for 3 years which performed perfectly throughout. However, it doesn't do double sided printing and this would be very useful to me so, after much research, I bought the Brother MFC9460CDN when the Epson finally died. I year in, I am posting this for anyone who is looking at laser printers because there isn't a lot of info available for users on these machines. I work form home and use this as my office printer, with a high volume of scanning & printing.
First thing to say, is that the Brother is a well built printer, easy to use and change cartridges and it has been 100% reliable. Double sided printing is perfect. However, there are a few points it is worth knowing about before you commit:
1. It has separate colour toner cartridges, but you have to replace all 3 at the same time. This has happened twice to me so far, so it can't be a coincidence that they ran out at the same time. The cartridges are seriously expensive (£100 each for high capacity ones), so over £300 each time you need to replace them. The Epson allows each one to be replaced separately, saving a lot of money, and they are a fair bit cheaper.
2. The Brother document feeder is seriously flimsy. The out tray has a plastic extension which would be very easy to knock off and the documents end up all over the floor without this piece of plastic. The Epson has a proper document feeder with full size out tray.
3. The Brother scanner is decent, but just not as good quality as the Epson. I had to fiddle with the default settings quite a lot to get a decent quality.
In summary, if you really want double sided copying, then I would definitely recommend this printer for its quality of construction and ease of use. It just feels well built (like buying a German car).
If you don't need double sided copying, then I would strongly recommend the Epson CX11 (or CX 21 the new model) - although it costs a bit more, it will save you a lot of money over its life and produce a better quality of output.