I recently bought a router with 300+450mbps dual-band connectivity. I have a computer and am looking into buying a wireless n adapter. Should I buy a 450mbps-capable card? They cost much more than 300mbps cards and I'm not sure if the price difference is justifiable if current devices won't saturate all of the bandwith. Also, will a 300mbps card slow a 450mbps network down to "only" 300mbps? Thanks in advance.