Few months ago when I last checked directly with JVCKenwood Singapore, DNX9170S was still not available when I got DDX917WS. You can try calling them here
You can also try calling their distributor Sim Khee Meng Enterprises Pte Ltd and also where to buy here
What car are you driving? If you are driving Toyota or Subaru, DDX917WS would fit better as it is a 200mm width model meaning there is no large gap and thus no need to use the plastic trim.
Both model support dual video input so 360 cam is not an issue after one is taken up by reverse cam.
Steering wheel remote is dependent on the brand of cars with the corresponding steering wheel adaptor. I'm not sure what adaptor DNX9170S comes with if any at all but DDX917WS already comes with one that fits Toyota and is plug and play. So if you are diying, you may need to get the adaptor separately. Else the audio shop should have the right adaptor to fit your car.
Just so you know, I downloaded the manual for DNX9170S but do not see voice command search feature for the built-in Garmin so to me it's a deal breaker. Android Auto or Car Play already supports voice command search in any case.
If you are buying from MY or overseas, you will have to consider support and warranty issue.
PM me if you want to know where I bought and install mine locally.
Edited by Carz73, 02 November 2017 - 11:20 AM.