Yo,
I think you need to figure out first of all what you need...
1.) Is your feed wireless or hardwired? If hardwired, do you need wireless for the kiddies or messing around on a laptop?
2.) If wireless, remember you are always limited by your limiting factor in terms of speed. IE, if you ISP only spits out 10mb/s...you don't need to bother getting a 450mb/s router, unless you are using SSH or VPN or VNC or networking a lot or something of that nature...(unless you want dual band or something to help extend your range in your house.)...
The only other comment is look into some reviews, some routers have a tendency to drop connections, low speed at times, have to reset often, whatever.
check your ISP speed here:
http://www.speedtest.net
3.) If you are hardwired do some search on this site, you may want to look into getting a switch on top of your router or possibly daisy chain 2 routers to make everything more secure...ie use the old router for the kiddies
I just got a linksys e4200...its the latest and greatest. On sale at bestbuy for $149.99
I must say it is way overkill for me but my speed is super consistent now and this router will be good for at least a couple of years if not more. Also, if you like messing around you can use dd-wrt as your firmware with the linksys routers as well (not available yet for the e4200). Helps make it more secure and gives you more options within the router.