Wireless G Range Extender question - please

I have a WRK54G wireless router that works great on my main computer and another that is connected via USB (WUSB54GS). These work well, other than the occaisional need to reset the router to get the connection up and working again. My problem is my laptop. It connects via a wireless card (WPC54GS) and it works very well also as long as it is close enough. However the one place everyone wants to use the laptop is in a part of my house with poor / no connectivitiy. Should I add a Range Extender (WRE54G Wireless-G Range Expander) to deal with this or should I scrap the entire thing, including the parts that work well for me in favor of a Wireless-N system? Thanks for any info on this decision!