If you're looking for another EMOTIV alternative, Neuralink could be a good option. Although it's primarily focused on developing brain-computer interfaces (BCIs) for medical applications, Neuralink's technology also includes sophisticated EEG abilities. The N1 Implant has 1024 electrodes on 64 flexible wires for higher-resolution recordings of brain activity. This technology could be a strong alternative for collecting and analyzing brain data with high fidelity.
Another option is Mind-Video, which generates high-quality videos from continuous fMRI brain activity data. It's more geared towards reconstructing video from fMRI data than EEG, but it shows advanced processing methods that could be of interest if you're looking for more advanced data analysis and visualization tools. This technology could be used in conjunction with your EEG data collection efforts to provide a visual representation of brain activity.