I apologize if this has been asked before. I would like to upgrade my D5100 to a full frame mirrorless. Has anyone gotten to use both the Z6 and Z7? I have looked at a lot of reviews comparing the specs but I am having a hard time deciding if it is worth the extra $$$ for the Z7. I mostly use my D5100 for landscape and wildlife photos as well as candid shots of my kids when we travel. I would like to be able to take better low-light photos as this is where I notice the biggest shortcomings of the D5100. Would you splurge on the Z7? Or go with the Z6 and spend the $1000 price difference on one of the lenses that is coming out soon? I want to make a good long term investment and my budget is flexible. Thanks!