I am nowhere near giving up FH11 (currently running under Win7) but InkScape http://inkscape.org/ is interesting.
It has a very large number of functions (probably too many), but it also shows what a group of volunteer programmers can accomplish. It seems to be on a scale quite comparable to FH, Illustrator and other commercial products.
Note it does not draw in CMYK, and probably has many dozens of missing or awkwardly implemented FH functions. The user community seems to be more "geek" than artist.
But... it already incorporates many dozens of person-years of development and it's open source! Might be something to think about if a "new-start" FH is contemplated.