From everything I've read, IBM is hardly the company it used to be. It might as well stand for "Indian Business Machines" these days.
IBM's hardware has always been the same though. From PS/2s, to PC300, to IntelliStations; they all share similar designs (extreme emphasis on modularity and toolless features). They are getting away from hardware, but that doesn't mean the new hardware is radically different.
Of course not many people know anything about new IBM hardware, for some reason. A 9595A PS/2 isn't too different from a 9229 M50 for instance. They both share the same splash screen, same RAM count, same BIOS tests. Although a 9595A is a bit more brutal with the SCSI RAM tests if you have a spock in it.
In fact, you probably won't find many (any?) quad core computers that do a POST beep, a floppy seek (with support for 360K), intelligence for chassis intrusion & systemboard LED indicators, ethernet indicators, etc. They also host two serial ports, a parallel port, 8 USB, 2 firewire, SATA, IDE, SCSI, etc etc etc.
Of course intellistations were not sold under System x, they later transitioned to System p:
(I only have a 3.5 FDD installed, but I could pop in a 360K 5.25 if I wanted to some day: the only problem is that Windows 7 does not like them, AT ALL the last time I had one-- but I did enjoy the FDD seek from it: a computer isn't really a computer without the FDD seek after the POST beep, in my opinion).
And yes, I later added the win7 and core2 quad extreme stickers (originally it was a core2 duo with an XP-vista compliant sticker). I have also modded the systemboards with industrial electrolytic capacitors for even more robustness.
Where's the 3dfx card you ask? Well, a 5500 can only be ran under windows 7 x86 due to unsigned drivers not being supported in x64. I tried. I believe there may be a way to get it to work, but honestly, I can't be bothered at the moment. I might just pop on win 7 x86 on another machine to test out the 5500s and 4500s AGP 4x cards.
But I digress, I have always enjoyed the System x machines, hearing the hotswap drives initiated one-by-one via serveRAID etc. I rescued two of them being recycled at work. Not sure what I am going to do with them yet, I may just give them away to someone who needs a good rack server.
While most in I.T. are completely oblivious to IBM hardware and enjoy their crappy Dells and HPs (or worse, their cheap homebrew systems with poorly chosen low quality components-- particularly PSUs), I will definitely miss the solid IBMs. There's no appreciation for good hardware anymore.