[bradreaves2]

Posture is most affected by muscle (im)balance, so if you want to fix hunching, consider exercises like face pulls that strengthen the back muscles that counter the chest muscles that pull your shoulders forward. There are ways to do these exercises at home with no equipment.

Second to that is the fit of all of your equipment: chair height, keyboard/mouse height, and monitor height. This can be difficult, especially if you are below the median male height.

I use motorized standing desks because they offer the greatest amount of control over surface height. I have a keyboard tray on one that allows me to set the keyboard lower than the work surface. I have all my monitors on arms so that I can set them to the proper height.

As for seating, other posts about spending for quality are right, as are options to buy used.

Herman Miller isn't the only game in town, though. I've been very happy with Steelcase products. I have the Gesture at work, and it's a great work chair with fantastic back support. At home, I have the Leap. Also a great chair for work, but I find it's easier to use in more relaxed tasks (e.g., gaming or watching YouTube).

It's taken me a while to get everything set up ergonomically, and while if you are judicious there are ways to save money, it isn't cheap. Of course, it's a lot cheaper than healthcare, so spend what your budget allows to take care of your body during working hours.