For several years I've purchased my laptops from
System 76. They're good, and I'm on my third laptop. Many moons ago I needed a hardware swap-out while I was on a 2-week R&R from an Iraq deployment, and they hooked me right up. (I also live 30 minutes from where their HQ was at the time.) I learned the hard way that I needed Windows to control the booting of Windows and Linux (usually SUSE), or Windows patches would never work quite right.
EFI is great. I'd not realized that you dual-boot with the EFI bootloader, not with EasyBCD, boot.ini files, or the other stuff I'd used over the years. I did have to delete some fonts to clear out a little space in the /boot/efi partition, but worse things happen at sea, you know. I'm really pleased how easy it was. Hit ESC when booting and one-time boot your OS. Beautiful.