SMC BArricade Keeps Dropping Signal

I had similar problems using WPA, this time on on a belkin wireless router. When I investigated I was told it was either the router iteself (it being rubbish), or that I had too many other wireless things interfering with the signal and causing it to crash, or my other equipment was too close to the router and again, causing it to crash. I moved the router to another point in the room. very highup and away from anything like my corless keyboard and mouse and DECT phones. It seemed to improve the issue, but as soon as somebody called me on my phone, the whole thing crashed again. Putting the security back down to WEP helped, but I didn't want WEP because it is releatively easy to crack. In the end I ditched the belkin and bought a Netgear router - this one infact: