I bought my wife a 2-in-1 a few months ago and regular touchscreen XPS 13 laptop for myself last week. I'm a big fan of the Dell outlet. Basically these are new systems that are returned, wiped clean, and repackaged in a very non-fancy box, and have the full warranty. And if you don't like it, shipping both ways is free so nothing to lose.
I think the best value right now is the latitude 5289 (12", my wife loves it) and 7389 (13") series which I narrowed down
here (you can play with the search function if you want more RAM or HD capacity) since they have a "pi day' sale going on right now They are both
31.4 % off with code 314159Lati
So that's as low as around $530 for the 12" and $620 for the 13". The smaller screen gets better battery life and is obviously more compact
The XPS 2-in-1 is a generation and a half behind in terms of processor (it uses an ultra low voltage version) and will soon be replaced so the outlet base prices are pretty good. It is however a nicer build and much less utilitarian looking It is worth getting the version with a faster NVme drive. Honestly, I would order one of each and see which you like better. You will likely need to do two separate orders since the Latitudes are from the business outlet and the XPS from the home outlet. You can see the selection of XPS
here. The best coupon they have listed right this moment for that is a measly 7% (though the dell outlet twitter account claims they have 17%) so the XPS is more in the $800 range.
In general if you order through chat you can get a few extra % off.
Hope this helps. Feel free to PM me if you have questions. I order several outlet laptops annually and have a pretty good idea of where the good deals are.
Just to add bit: none of these models has the newest 8th generation processors. The advantage of which is in part that the 8th gen i5 is now a 4 core processor and a really good balance of speed and energy use. I'm typing this on an XPS 13 9360 so equipped. If processing speed is really an issue for you (and it is not for most tasks) then you might consider going for the i7 versions of those models. The latitudes use a standard laptop processor. The XPS 2-in-one uses a lower power processor line due to heat and space limitations inherent in the fancier design, so from the processor side its a bit hampered.