On my main system, I have the M-Audio keystation PRO 88, which I bought used for under $100 at a garage sale. I quite agree with Vastman -- a great keyboard with tons of features, a nice feel to it, and damn near indestructible.
On my secondary audio PC, I'm running an old ESI Juli@ PCI sound card, a set of original M-Audio BX5 monitors, and my prized antique: an ancient Peavey / Cakewalk Studiomix that still works like a charm. All this on a PC running Windows 10 64, and Sonar Platinum. The M-Audio BX5's are pretty ok for small, inexpensive monitors, and they've endured 10 years of service with no technical problems at all. Overall, I've personally had good experiences with M-Audio stuff.