The CCNP is a safe choice. You can go for a CCVP if you want to work with QoS and VOIP phone systems, but that is a more specialized field.
Get some training / certifications in non-vendor specific areas. For example, with your CCNA, you should be able to sit & pass the Network+ exam with a little preparation. Then, consider other non-vendor certs from CompTIA like Security+ or the ISACA CISA or ISC2 CISSP.