[bq="igotnopicks"])
> MK7 is one of the best Rainbow Roads along with N64 Rainbow Road and MK8. [/bq]
Those are probably my favorites. I like the GBA & original SNES ones too though, despite how "outdated" the flat Mode-7 effect is.
(I oddly have nostalgia over Mode-7 though having grown up in the SNES era.)
Sense GBA "Super Circuit" was developed partly by Intelligent Systems, they actually had a Paper Mario easter egg in GBA Rainbow Road of Bowser's skybound castle.