[MovedGoalPosts]

I use a Linksys WRT54GS - it's one of the earlier versions. That works fine with torrents and stuff, needing only the occasional reboot (just like your PC sooner or later goes wonky) now that I've flashed it's firmware to DD-WRT. Even with DD-WRT you need to adjust some settings in the firmware to prevent the logs getting overful and more importantly to prevent the router trying to hold on to too many connections.

Indeed the major problem with p2p torrents, for the majority, is trying to doo too much, and trying to hold open too many connections at once. That saturates your bandwidth. Torrents work by throwing out loads of connections to other PCs in the hope they have or want the file your have / want. Those connections can swiftly overload stuff if you are too ambitious. Equally if you get carried away by maxing out your upload and download bandwidth (remember you need to allow something for your wireless users too), you are asking for things to grind to a halt.