I am sorry you did not receive a response. I currently own the Fearless 1212/6 and I love it! Very clear sounding, spreads bass everywhere, a lot of low end, plenty of midrange. You have some room to adjust bass tones with this setup. I believe the Fearful has a more aggressive character and more low end here, but they are not too far apart.
Berg 410NEO - AE series or HS series? Or am I missing something? Bergantino cabs have a unique voice to them, but they are quite loud and VERY usable in a band context. They are great cabs and you would definitely get something great here. I have personally played the 410AE and the 410HS. Two amazing cabs with two completely different tones.
Avatar - no experience with that 212, but I have used an older 210 of theirs and was not too impressed. Just simple bass tone, semi-loud, then again....I can't confirm if it was working 100%. To be honest, if you have the money for a Fearful/Fearless, don't bother with Avatar. No offense to Avatar, but it's budget gear that works great for some players. Nothing wrong with that!
No matter what, you should definitely try to track down cabinets to hear for yourself. Take advantage of Guitar Center's Used section and their 30 day return policy. You can try out a lot of gear like that - get it delivered to the store and make the return even easier if necessary. Otherwise, do a road trip and try out whatever you can in person.