Advice on Upgrading Cameras
I've been shooting with a Nikon d3200 for about 4 years now and I'm thinking about upgrading my camera body. I do mostly landscape and nature photography. However I sometimes will do some events for friends. I would like a camera that is great in low light for milky way/star trails AND that is also good for shooting moving animals, sports occasionally, and moving people in dimly lit situations.
I've been mulling over several choices. Staying with the Nikon aspc censor and getting either the d7500 or the d500. Or possibly going full frame mirror less on something like the Sony A7II. There are some good deals out there right now for some of the slightly less new Sonys. I've also found a deal for a Nikon D810 for $950 however the shutter count is over 160K! Is this too much to consider the D810?
The 2 main lenses I use are the Tokina 11-16 f/2.8 and Sigma 17-50 f/2.8. So this is a plus for staying with the aspc sensor. I'm wondering if the kit lens (28-70 f/3.5-5.6) on the Sony A7II would be significantly better than my tokina/sigma on a D500/7500? My budget is around 1500$ so I'd be able to get the Sony w/kit lens and probably another wide lens. My biggest fear about going full frame is not being able to use the lenses I have already. But if the kit lens on the sony and something like the Rokinon 16mm t2.6 would produce significantly better images than it may be worth it to me.
I know this topic has probably been covered to death but any advice on my predicament would be greatly appreciated. The guy online at B&H said the Sony w/kit would be significantly better than the d500 with my tokina but I"m skeptical. Also, that D810 with a 160K clicks! Is there still a lot of life left in it? Would it be worth it at 950?
Thanks in advance.