Lurikrunch

For my HTPC set up, I have decided that I will need a wireless keyboard and mouse set up. I would prefer a keyboard and mouse as opposed to an all in one like the diNovo EDGE as my mother is going to be using this as a workstation about 25 feet away. My only problem is that I have yet to find any with that kind of range: most appear to be only 6 foot range (if you are lucky). Can anyone give me a suggestion for a long range wireless keyboard and mouse? I'm not too picky about brand (I personally prefer Logitech), but I would prefer to keep the price under $80.