I used XPS laptops with Ubuntu for years and thought they were great. The last one I got, though, at the last place I worked, had that weird, 'seamless trackpad' or whatever they call it. I couldn't stand the thing. I much prefer the basic trackpad on the $250 Chromebook I use for personal email/browsing these days.
Is the entire area under the keyboard a trackpad or do you have to just guess where the edges are?
MacBook trackpads are their single best feature. Even 10 year old ones seem to be better than everything else out there.