There will always be something new and better coming out, that's the way technology goes these days. Just have a look at your system (unless it is absolutely brand new) but I bet in some areas there are better parts available now.
When will you ever need that much range on wireless and speed?? Home net connections are not faster than 24mbit at the min and do you live in buckingham palace?!?
The WRT54G/S is a perfectly good router for home use. Easy to configure and manage and if you want to dable a bit further, you can flash the firmware and install new software.