If you type a lot or code, purchase a
mechanical keyboard with
Cherry MX Blue switches. I own a couple, they are a real joy to type on, and I am super accurate with the Cherry MX Blues. Go on Youtube and look at reviews. I am definitely more accurate, and perhaps 10% to 15% faster, on a good mechanical keyboard with MX Blues. Not an exaggeration; I press the backspace key way less when on a good mechanical board, and it's way easier to speed type without looking down because your hands and fingers have a lot more room and easier travel across the board, as well as improved tactile recognition of key presses.
Also, I recently responsed to another thread, located
here. If you want a really great keyboard, get the Das Professional S for Mac Mechanical Keyboard. It's more than double your target budget. But I believe it is well worth it, because the two most important interactions between you and the computer are the monitor and the keyboard -- hence I get the best for both.
If you are not convinced, then look for a cheaper but sturdy alternative with Cherry MX Blue switches, if you are a typist or coder.
Here is a handy spreadsheet for various mechanical switches. If you really pound on keyboards, then you can go for heavier switches, such as clears or even greens (very heavy press).
Once you go mechanical, you will never, ever go back to crap membrane keyboards which come with most computers.