Wireless AP vs Multiple Routers

So to extend a wireless network, why would I potentially look at a Wireless AP at about $150 over a full featured wireless router that I could bridge say for $90?Or is there a cheaper way to do it. I'm not adverse multiple routers as it gives me multiple network connections at each location for if wiring is an issue - say one behind the telly, and one by the main computer where there might be more than one network device in that location.I know the best option is star wired network back to a switch/router.