Rob has a Netgear R600 router and the signal keeps dropping. Leo says that routers are commodity computers that have no cooling. Because they're always on, it's not surprising that they can become unreliable. Since they're cheap, he could just toss it and buy a new one. But before he does that, try installing the latest firmware update or even a third party firmware like Tomato or DDWRT.
DLink is Leo's favorite router for PC, or the Airport Extreme from Apple.