I would like to get maybe a few Cisco routers and switches to help with my CCNA and later CCNP study. Would Cisco 1720 or 1721 be a good buy for my purpose? Price-wise I can maybe get three 1720 and three cheap Cisco switches. But the product page at Cisco.com says 1720 support only OSPF. It doesn't support EIGRP. Can this be a problem for my study of other routing protocols? Should I get a different Cisco router that supports more routing protocols?