I have really only one niggle with X2. My latency was not near as good as in X1 for whatever reason. Other than that I have been very happy with X2a. Now with the new toys in X3 it feels like, "WOW, look at all the neat stuff to play with!" That kind of thinking is not healthy when it comes to actually making music. Maybe there are some settings that you missed to get what you want from X2.
Just keep in mind that these software programs didn't even exist when a lot of our classic and best songs were recorded. You have a lot of horsepower in whatever DAW you choose to use. Use it to the best of your ability. That way when you CAN afford X3, or Pro Tools, or Cubase, etc. You will have plenty of songs to port over into your newest workstation.
To me, it's really about making music. Not about having the latest and greatest toys and spending more time playing with them than actually making the music.
That said, I will probably update to X3 in another couple of weeks. I usually let the dust settle and watch the forum closely to see just what is happening for about a month before I jump. Meanwhile, turn on X2a and get to work! :)