Hey guys,
I finally managed to also change the hembra to a cow skin sent to me by Isaac. It sounds and looks great and I'm really enjoying it. Still needs some time to break in though

To answer the original topic question once again - yes, it is worth it to change the stock heads.
Anyway, I guess I am still struggling with the proper tuning. My hearing in context of recognizing pitch or intervals is not that great, so I would like to ask what pitch do you tune your bongos to? If you do it by ear and don't know exactly, could you try and identify the pitch with a tuner please? It seems I tuned the hembra to D4 and macho to F4 - which now seems not that far apart. How much higher should I tune the macho?
I believe that if I set for a specific pitch combination, I will get used to it and tune it correctly in the future without the tuner. This is how I learned it for my congas eventually (give or take)..