Oh man, I had a 4/66 as a younger Cory. It was a great little machine. (And proves that I tend toward business desktops most of the time. There were plenty of consumer-focused 486s to choose from, but the Prolinea was what I got and enjoyed.)

I ran NT4 on mine most of the time, it definitely has a regular IDE controller up on in there, and I alternated between a CD drive and a 5.25" floppy drive. The video is pretty standard, I think it's the C&T 65525 or whatever, NT4 supported it fairly well anyway.