I just purchased a linksys 802.11 B standard router?

if the G-standard routers are rated three times slower than what can I use that router for that will be effective but minimize fustration? I had the idea to link my laptop, X-box 360, ITv, and I have plans to link a Wii and/ or PS3 if and when I ever decided to get one. how will these decisions affect my house hold network in terms of speed, reliabilty, and security?