There's just no reason to buy IBM
We have a fleet of x3550 m<something I can't remember right now>, and the hardware is no better than the HPs or Dells I've used in the past. And when I had to raise a high-priority support call regarding overheating CPUs, apparently our 8-hour response was 8 "working" hours, despite the fact that we had 24x7 maintenance on them. Then nobody actually attended the machine for a week! I'd shoved it into VMware Maintenance Mode, so so damage done there, but we were down a resource for all that time.
Guy turned up. Inadequate thermal paste from the factory. He also said the other CPU was looking a bit light. He fixed it and went in its way, with much cooler temperature readings.
The end of the story? Not likely! Next time I was in the datacentre, I was performing CPU upgrades on a couple of machines, and saw first-hand the inadequate thermal paste on the machines I was working on. So that was sorted out during the replacement. I then went through the remaining machines and re-pasted them all. Finally got to the one that had been "fixed", Decided I might as well, and opened it up. Then spent about 30 minutes cleaning out thermal paste that looked like it had been applied with a shovel.
Do our fleet of IBM servers work? Yes.
Do they work as well as the HP or Dell equivalent? Yes, I reckon so.
Would I buy IBM in the future? Hell, no.