Just a suggestion. Instead of getting a new keyboard, check out Filter Keys. Filter Keys is an accessibility option included in Windows. What it does is makes the keyboard ignore keys which are just briefly pressed. Would that possibly solve your problem?
To access Filter Keys, in Windows 8, bring up Control Panel, then select Ease of Access Center. In the older versions of Windows, it might have been called accessibility instead, I don’t remember. In Windows 8, click on “Make the keyboard easier to use.” You want to turn on Filter Keys. But make sure you check out the options available within Filter Keys. From within Filter Keys options you can designate how long a key is to be pressed before Windows recognizes it. You may have to experiment with that length of time to see what works for you.
Not likely, As I do not press the wrong keys any less time that I press the right keys.
One thing that has helped is using the auto hotkey utility to remap the caps lock key to ctrl + c, and the escape key to ctrl+v (and Esc the becomes Num Lock). Many other things are hot keyed also in the interest of speed. Thank God for what helps.