Not a fan, sadly.
I've commented before on Oreck XL vacs. I wish I could like them and had my parents not had one, I'd probably have bought an XL7 by now. My parents had a light grey XL with a black bumper. Bought brand new in the 1990s and had it for a couple of years but they couldn't stand the noise or the fact as you say it has a narrow dust channel up the back of the spine. The other problem we had was that our XL was particularly hungry for drive belts though I did like the side door slide out access for changing one around and the hidey bit on the sole plate. What I didn't appreciate was that our older model had a bag snap on fixing - not the slider holder that current ones have - so the bag could eventually come off no matter how many times I ensured the bag tongue when over the plastic bit on the oval dust channel.
The other downside is that I have never appreciated the fact that the Oreck never cleans flat to the floor. Oh it can fall to the floor, but the brush roll doesn't actually sit flat like a Sebo X1 and you can't wheel the XL away after use, it always has to be carried. I notice that the XL10 and XL7 have a partition at the back that allows you to wheel those vacs away after use.
The only things I like about the Oreck XL is the long 10 metre cord length and the brush rolls - they seem to groom carpets extremely well - but having to replace the side brushes every couple of years is a bit of a nuisance and the UK market/Oreck UK at that time charged a high cost for the dust bags, with the Celoc white ones being quite hard to buy as they were constantly out of stock.