[dmayle]

The 5510 gives you 4k touch, but is limited to 32GB of RAM (and has a slightly weaker processor) This is the business version of the skylake XPS 15.

[fdim]

Fits perfectly for my needs :) I've got 6820HQ and FHD. Not sure if anyone would notice any difference from 6920HQ.

Also "limited to 32GB" sounds a bit funny. Would you mind sharing why would you need more? (I am developer btw)