Yikes! $600? There are a couple of Cradlepoint routers that do WiFi as WAS and unless you have some specific commercial need that requires the IBR600 I would suggest that you look at the others. The MBR95 does it all and should work fine for most users for less than $150. There are a few steps up from there but the differences mostly have to do with how far away you can get from the router with your computers.
The WiFi Ranger is a good choice as well, however, I am having issues now which I have not been able to get any support for from the Ranger folks. I have no idea why since I have been a beta tester for their products for many years. It gives me pause to be able to fully recommend the product at this time.
What I post is my 2 cents and nothing more. Please don't read anything into my post that's not there. If you disagree, that's OK.
Can't we all just get along?