Management GUI for Cisco switches

Hi everyone,

I'm starting the planning for implementing VLANs on our Network (~70 users). In a perfect world, I would have the budget to replace all of the SG300s we have mixed with out 2960x models, but this is the real world.

I'd like to have a management interface for the switches. Cisco Network Assistant seems promising, but it doesn't seem to be able to manage the SG300s. I will primarily be the one doing the VLANs, so CLI isn't too big of an issue (although GUI preferred as this is my first implementation).

Are SG300s too old for CNA or is there a better alternative?

Thank you!