First things first. What I quickly discovered was that Logic _sounds_ better. Just dragging in a sample from you desktop seemed to reveal that logic was processing it in a higher quality. A weird thing, and maybe it's placebo, but everytime I go back to ableton I notice this. Furthermore, the bottom line is, my productions just sounds better in Logic. Maybe it's the workflow it encourages, I'm not sure. All I know is that no serious audio engineer would use anything else than Pro Tools or Logic for a serious recording, and I agree. At least that's my experience.
Regarding Reason: In my opinion, it has some of the best synths in the business. Which is why i rewire into Logic. A couple of youtube tutorials on Thor and you'll be going strong.
Ableton, well, I don't care much for it. The only thing i really miss is how easy it is to manipulate audio in it. A lot of people talk about how fast it is, but the design always seemed to get in my way. Personal preference i guess...