If you are interested in dipping your toe into in-ear electronic protection, I would recommend starting with the EEP-100 for ~$144. The included foam tips will get you 27 NRR and you can increase that to 30 NRR with replacement tips at ~$21 for 10 pairs.
I have the EEP-100 and use them outdoors with the 27 NRR tips and am very pleased with their performance. I am using them to replace Howard Leight Impact Sport electronic over ears. My biggest complaint with over ears is when I shoot a rifle my cheek weld will break the seal. I would resort to foam plugs under the impact sports and then turn them all the way up. This was uncomfortable for extended range trips and I still had to talk loud/ yell to range buddies.
With the EEP-100 I can keep them in ear at a good volume and not break the seal from cheek weld on a rifle. Outdoors they work perfectly and I don’t notice any discomfort from extended range time and the 27 NRR allowing too much noise in.
I plan to use these with centerfire suppressed rifles as soon as my cans clear. I will probably bump down to the 23 NRR tips in that case as I won’t need much to stop the remainder of the sound with the suppressed rifle. Even dry firing and racking and dropping bolts/slides the EEP-100 will pick that up and gate that noise. Pretty impressive.
Your use case may be different, but the price to performance for me is perfect.
https://www.amazon.com/dp/B07P8YDBZD/ref=cm_sw_r_cp_api_i_R.7GDb3XZWK9X
https://www.amazon.com/dp/B00AEY4RRO/ref=cm_sw_r_cp_api_i_Zc8GDb2PT8MZY