Kirby (in my opinion the models prior to the Sentria) or for a basic upright the commercial Sanitaires. I'm sure there's plenty of info out there on the Kirbys, and I love my Ultimate G, but she's very heavy, and her attachments take up a lot of room. She's like the spend the whole day removing all the dust bunnies vacuum, kinda cumbersome.

But the Sanitaires clean carpets and clean carpets well for half the price of a professionally refurbished Kirby (so just grab a canister vacuum for the attachments to clean above the floor, like an old Kenmore Progressive canister). My Kirby, idk, the price point makes me worried I'll hurt it, even though I know that's probably almost impossible.

The Sanitaires are the same design as the mid century Eurekas, my family's Eureka was from the 1960's, and still worked perfectly when my mom rolled it out to the curb in the early 00's. No idea why she did that, aside from "the FiLtRaTiOn", but I bought a commercial Sanitaire last year, it's a workhorse, and it's like, oh I remember all of this from that old vacuum. It's the definition of, "if it ain't broke, don't fix it", the design hasn't needed to change, because it works. Except it has an upgraded allergy filtration bag, and seems to be heavier duty since it's commercial grade not residential grade. The parts are extremely easy to come by, it's direct air, so it will clean the carpet and the padding underneath the carpet, it has insane CFM. The brushroll is metal and has bristles and a beater bar, but it vibrates the carpet clean, it doesn't damage carpet fibers for such a powerful machine. Both the Kirby and the Sanitaire will get all the sand out of your carpet, which is what cuts the carpet fibers like tiny pieces of glass. The only parts you'll probably ever have to replace are the bags, the belt, and maybe the fan if you vacuum up bullets and bolts. VacLab on YouTube does good reviews on vacuums.