D-Link Wireless Router

This may seem like an obvious question, but ive been looking into purchasing a new D-Link WBR-23 Wireless router to replace my Linksys wireless G AP, and Linksys etherfast cable router, anyway am i right in thinking that if i buy a D-Link wireless router it does the job of my current linksys AP and router? i.e. if i were to buy this router it would replace both of my current pieces of hardware and i would not need to buy a new AP?

also, can this wireless router connect to the modem through a seperate router? as two of the computers in my home do not have wireless access
Thanks for the help

-Cheers