Welcome
All the NXs will hold their quite value well over the next few years in percentage terms, but with an expensive car that percentage translated into thousands of pounds.
I think the 4WD models will be more desirable however the lowest priced model will always have an appeal to people who want an NX but can only just afford one.
I'd try and get £1k off the price, you would do well to get it though as the NX sell quite well. Try and negotiate at the end of the month, or end of the dealer's financial quarter, to get a bigger discount and push for free services or warranty extensions if they are not willing to lower the price too much.