Hey there! I've been looking for a new camera for some time. I'm on Nikon 5100 and I've been satisfied with the IQ (especially with my Nikkor 35mm f/1.8). However, I started feeling limited by the ISO performance and little controlling options (d5100 only has 1 function button). So, until a few days ago, I thought I'd buy an used D7100 or D7200 (which has much better control options and somewhat better ISO performance) along with Nikkor 17-55 f/2.8 to get the best out of the extra resolution (they're both 24Mpix DX cameras. BUT a few days ago, I was listing through cameras on ebay and noticed how the price of the Sony A7 has dropped after the A7II release (for comparison - here in Canada "like new", used d7100 cost about CAD $800, the d7200 about $1100, the A7 about $1300 and A7II $1800). For the similar price of the d7200 and a7 (about $200 difference maximum) I'd go for the full frame a7 as I'd love the smaller body and better ISO performance. BUT here comes the other side of the coin. I'd like a fixed aperture mid range zoom (equivalent to the DX 17-55 f/2.8). I saw that Sony makes the Zeiss 24-70 f/4 which would be perfect for me and I would be able to get used for about $1100 which I'd be willing to spend on a quality lens. But this one gets quite terrible reviews for being unsharp at its 24mm and 70mm. So, the question is - do you think I should go for a7 with the Zeiss24-70 f/4 even over its questionable reputation? Or would the Nikon D7100/7200 with the 17-55 f/2.8 serve me just about similar at a lower price? Or is there another good mid-range zoom with fixed aperture that any of you use with the A7 and would recommend? Also, do you think the a7ii is worth the extra $500? Any advice much appreciated!