I also work in IT, consulting for many clients in many different environments so I have seen a vary wide range of technologies. Personally I find Logitech support to be very good and in my opinion any product is only as good as the company that stands behind it. I am sure there may be some who have not had the same positive experience but that can be said about any product or service. As far as off-brand being as good, I completely disagree, cheap consumer electronics are just that, cheap, they use inferior components, very often have a poor quality fit and finish, and you can forget about warranty. They are best enjoyed by uninformed consumers.
Keep in mind that all mice wear out, the buttons can only get pressed so many times before they start to fail or just stop working. Beyond opinions on what to buy, I find a mouse is best selected buy the feel, after all it will be attached to your hand for hours each day. You should go to a store that has a good assortment of them and see how they fit, feel and if you like the feedback of the clicks, too dead, too lively etc., it's personal.
Personally I prefer a cordless mouse, but one that is rechargeable. Logitech used to have charging cradles but they had issues with them so abandoned the design in favour for a micro-USB connector to charge. At least they did last time I replaced mine, maybe they brought them back not sure. My Logitech performance MX click buttons are just starting to go now so I will likely be replacing mine next week.
Good luck.
