Are the VPN's terminating on the routers? A 3945E is a pretty big router and sounds like it could be overkill, but it depends what exactly these routers will be doing. What features are looking at in the DATA license? Chances are pretty good that the 4451 will come in cheaper or around the same price. Again it all depends on what the routers will be doing. Why do you think you need a flash and DRAM upgrade? Is there something specifically you're doing that warrants it?
I know the basics for Cisco routers and switches but what I want to know is, if I set up VTP on a switch, is there a way to send it through routers to other switches? This will probably end up more hassle than gain, but it's interesting and cool to p...