throwingks pretty much hit the nail on the head, no need for a super router, Get a super switch! A switch will really improve your local speeds for streaming from PC to PC, or PC to xbox. Also, I get about 1-2 mb/s faster going through a switch for box to box x-fer than I do going through my router.
Also noted above, stay away from hubs, they are designed to distribute bandwidth, effectively, if you have a 5 port hub that is 10/100, at full use (100mb/s in) each port only gets 20mb/s. So by using a hub, you are cutting your local B/w by a huge amount! A switch on the other hand, can switch full load of 10/100 per port.
As for your question about the static Ip, switches operate on the 2nd layer of the OSI, so they are switching via mac anyway (rather than Ip like the router), so static or dynamic address will matter not to it.
Although I will say, I'm not aware of any decent brand gigabit router with wifi built in so that might be an issue. But you can most certainly plug in a wireless AP ( to the switch) and you are good to go.