I want to replace our 7206 edge router with a 4900M. The switch has 512MB and lots of options for GE & 10Gig. Obviously, the usual progession would be to a 7600, but the layer 3 switch has more than enough memory to store 2 full BGP routing tables (eBGP & iBGP). Also, the 4900M has the throughput that costs a fortune on a high end edge router. Could anyone tell me why this is not a good option?