You can't get more budget than the G105, yet, it is still one of the best gaming keyboards on the market. It doesn't have fancy backlighting that does eleventy one different things. It doesn't even have full anti-ghosting (at only a 5 key rollover).
But what you do get is the durability of Logitech keyboards, as well as media keys on the function key, a soft blue backlight and 6 customizable G-keys with macros that can be recorded on-the-fly. Oh, and you also get a fancy button that turns off the Windows and Context Menu keys