Their business line (optiplex/latitude/precision) are top notch. I never touched their consumer line (Inspiron vostro or XPS). More on reddit.com

I would definitely go for the 7560 if I had to choose between those specs. Higher screen resolution makes lots of text on screen much nicer to read. And the 35xx series are basically Latitude 55xx with slightly different GPU. Only one fan and will throttle the CPU whereas the 7560 should allow it to turbo much longer. More on reddit.com

I have been using Dell Latitude laptops since 2016, first a 7350, then 7390 and now a 9430. In my experience, these devices are study and good productivity machines. I travel a lot for business and rely on these machines to get work done, and have been very happy with the devices and support. My recommendation is to get the ProSupport (Plus) warranty. The coverage is world-wide and it typically only takes a few minutes to get a knowledgeable person on the phone or chat. Two of the devices that I owned required service (defective touchscreen, defective SSD) and Dell's support ensured very minimal downtime. In terms of costs consider the Dell Outlet. My top-of-the-line 9430 with 5 years of warranty and accidental damage was only a little over $1000. It is a very nice machine. More on reddit.com

adding to the_termin8r above Latitude and precision are both part of the commercial portfolio targeting business customers with at least 3 years warranty, latitude is generally mobile-first lineup that uses low wattage CPUs (ultra books), while precisions are mobile workstation with high power cpu(H) XPS on the other hand is premium consumer with one year warranty as baseline, you can look at the first letter in model number to tell, inspiron is 3k/5k/7k, xps is 9k Latitude 3k - similar to inspiron and vostro, thinner lighter, shallower keyboard Latitude 5k - workhorse laptops, plastic build, ISO compliant keyboards Latitude 7k - premium laptop that are thinner with carbon fiber and other better materials Latitude 9k - ultra premium laptop with CNC shells and premium options such as 5g connectivity and for precisions..precision... Precision 3k - outwardly the same as Latitude 5k in terms of look but with H series CPU Precision 5k - basically XPS15/17 that's in different color and additional CPU offerings Precision 7k - uber performance in terms of stability and offering options such as various RAID options More on reddit.com