@Dan 55, re Lenovo.
Configure the machine you want with the smallest HDD they offer on that CTO build. Once you get it from them, remove the original drive & stick it in a safety deposit box. Install new, larger, faster SSD & install a fresh copy of whatever you want.
Even though the Business grade machines didn't come with the scumware that the Consumer grade ones did, it still makes sense since you get charged less for the machine, don't ruin the default instal in case you need to send it back in for repair (swap drives & they never know), and you get a clean install of whatever OS you desire.
Sure a Signiture Edition would be nice, but given how easy a ThinkPad is to open up & user upgrade/repair, making your own "Signiture Edition" takes a screwdriver, time, & the intelligence not to stab yourself in the head with the pointy end.
*Grins*