From my own experience, Think Pascal was fantastic for the time. MPW was serious and high-powered stuff for pro development on a late 80s/early 90s microcomputer; used it professionally for 2 or 3 years and loved it. Never tried the other ones you mentioned.

As you say, it's incredible how slick and sophisticated those systems were, given the hardware of the day. I mean sure current IDEs may be preferable but we're also using 4 Ghz systems these days instead of 40 Mhz or whatever.