Thank you for the warm welcome Bjorn & Frank.
Yes, i'm certainly enjoying the D500 so far. I have the Nikon 28mm f1.8G and Nikon 50mm f1.8G but need to flesh out the kit. It's actually a return to Nikon for me after a few years. I'm a wedding photographer and I think i'm probably one of the only wedding photographers around who has returned to DX from Full Frame! 99.9% of what you read online advises the other way around! For me, i'm prioritising build, reliability and autofocus for the next few years and was quite smitten with the D500. Now to fill out the kit.
I'm planning on hiring lenses for the next couple of jobs and get a full kit by March. I have certain favourite focal lengths I want to cover - preferably with fast primes but i am seriously contemplating a zoom at the wide end (I haven't used a zoom in nearly 8 years!). I want to cover approximates of 20/30/85/135 or there a bouts.
The Tamron 45mm 1.8 does look good and it has a particularly lovely look to it. That with the 15-30 and the 85mm 1.8 will give me an interesting and very usable kit. Plus VR and weather sealing which would definitely be plus points.
Art Sigma Art kit of 20mm, 50, 85mm would also be interesting and very usable. I also like the look of the new Irix 15mm 2.5 to five me a 21mm equiv.
I live in quite a rural area with no nearby shops to go and try stuff out unfortunately. Like I said, i'm planning on hiring lenses for the next couple of jobs and I could hire the Sigma's but I'm loathe to risk any potential focus problems at a wedding so will probably play it safe and hire Nikon.
And I may end up getting the obvious option in the end anyway which is a Nikon kit. Maybe the 14-24 and some more 1.8G lenses or the 85mm 1.4G. I have the 50mm 1.8G but am not so keen on it so far but some more use may change my mind on it. I had the 85mm 1.4D and 24mm 1.4G years ago on D700's and they might be a good option again.