Law office computer users spend too much time obsessing over the internal specs of their machines and not enough time thinking about the devices they use to interface with all of that computing power. The mouse (or other pointing device, such as a trackball), keyboard, and monitor you employ will make or break your computer using experience. For example, if you are using the keyboard that came with your computer, you are making your job harder than it needs to be.
I type every day on a decades-old IBM Model M mechanical keyboard. It uses "buckling spring" keys. More modern mechanical keyboards use "Cherry MX" mechanical switches in a variety of designs that determine how they feel and sound. Some designs, designated by color, are good for gaming, others are designed to touch typing. For a great explantion of the different mechancial key types, read this article from PC World. Once you have done that, serious consider retiring the stock keyboard that came with your computer and buy a mechanical keyboard. They are available new, or you can do what I did and buy a used IBM Model M on eBay. Most sell in the range of $30 to $80, depending on condition and whether the seller and fully cleaned and inspected it.