First let me mention that you have a 17" MacBook Pro and a 13" MacBook Pro. Apple stopped making Powerbooks around 2005/2006.
As far as the router. Almost any router is compatible with your computers...so just pick one that you like (maybe based on price, easy setup, etc.).
Welcome to Mac-Forums!
- Nick
How about those new AC group routers? Is that a waste or can my Macs take advantage of them?
You need a new network adapter for your computers to take advantage of the wireless AC spec. I don't think either of your computers has wireless 802.11ac built. You're most likely running 802.11n.