Go for the 1TB and don't worry about squeezing into 250GB ever again... The physical install was very easy on an 8600K build. I was actually surprised to see this includes a license for some disk cloning app, which made migrating a Windows OS install off the existing smaller SATA SSD onto this new larger NVMe SSD very simple and easy. Although it did require some partition resizing afterwards as the disk cloning software decided to extend the recovery partition instead of the main OS partition.