I need a new keyboard!

[MiRai]

I can push down all 105 keys at the same time if I want to and the computer will register all

This is true for any PS/2 keyboard, USB keyboards, as far as I know, have a limit of 6 keys that can be sent at the same time [or something along those lines].

I bought a Razer Lycosa together with my new computer and its by far the worst keyboard I have ever used. Even 5$ keyboards was better.
The keyboard would randomly stop working, either totally or just some buttons and the usb-cord had to be replugged for it to work again

I own a Lycosa and while it is not the sexiest keyboard in terms of comfort, I would say that it is better than a $5 keyboard. If I don't load the Razer driver the thing works fine. But if I load the Razer driver and its systray program then I would occasionally get those same problems where certain keys would get stuck or stop working and could only be remedied by unplugging and replugging in the USB cable.