I'm personally a really big fan of IBM's hardware, particularly their POWER-based systems. IBM hardware simply never dies, and I've witnesses firsthand the "nobody was ever fired for buying IBM" phenomenon. Lenovo's IBM-derived products (i.e. their ThinkPads and related workstations/PCs) are also among my favorites by way of their IBM heritage; ThinkPads in particular are known for being among the best laptops for FOSS operating systems (GNU/Linux, the BSDs, etc.) when it comes to out-of-the-box hardware support, and many of them will even run custom BIOSes like Coreboot.

I'm not as much of a fan of their software, though that's probably because I haven't really used a whole lot of it.