I think everything depends on your data type and your theoretical basis for analysis. IN many doctoral dissertations defended at my university researchers use Atlas.Ti for analysis. If you're working with texts Atlas is quite user-friendly. But you may want to try elan for visual or audio data... I don't know much about NVivo sorry...
Hi, I used Atlas.ti for analyzing about 50 interviews, and two focus group transcripts and it worked really well. I used Atlas.ti because we had a licence available at our university. I tried also Nvivo in another institution and I found it more appealing and easier to use, its interface and the way it organizes content is closer to my way of thinking. However, this time I could not choose and I make the best use of Atlas.
I think that either one of these tools can work for you. It is a matter of preference, taste and ability to adapt to new software.