I'm on a P51 Lenovo, I had been using Apple laptops for the past 15+ years, I run Fedora with Gnome on it and have no 'major' issues with HiDPI, I highly recommend switching to Lenovo hardware, luckily I don't need any Mac specific apps, but if you did, there are certain configurations of Lenovo laptops that are relatively easy to get OS X working on.