Cisco 2811 512/128 Router
This 2811 packs lots of features and punch into the price. You have 512 DRAM and 128MB Flash so you can run 15.1.4 IOS and install CME 8.6 to do your Voice labs. If you do go the Voice route, you will need to add a PVDM2-32 or better to it. It obviously can do all of your CCNA labs and can also do your CCNA Security labs with the 512/128 configuration. This router also upgrades perfectly for CCNP and CCIE topologies.