Logic Pro 9 or Logic X

I've had both, but now switched fully to LPX. No use in sticking to the past 😉 Besides, Apple won't allow you anyway (if you'd like to use more recent versions of LPX).

I have and use Logic 9 and Logic X.

9 is still the one I use most (in OS 10.6.8). I get projects that come in in X and I leave them in X. Any Pro Tools users who ask me to mix will (nearly) always bounce the wavs out and I drop them into 9 not X.

I have nothing against X at all but 9 is way more stable, faster and you can get a lot more tracks out of it if needed. I will occasionally mix in Pro Tools 11 if a client doesn't want to bounce wavs out.

The main thing is, no one knows, or cares, what you recorded or mixed a song in. They only care what they hear when they hit the play button. Use whatever you feel comfortable using. A friend of mine uses a Fostex 2424 and a 56 input desk and outboard. No comuter at all. They make good records.

I don't feel the urge to have to 'upgrade' but I make sure I have upgrades available in case I get something in in that format. while ago I had a project come in that had Chromaverb inserted and I didn't have Logic 10.4.x at the time. As it turned out, the patch and application they used sucked and a Lexicon I programmed up did the trick.

So, in short, Logic 9 is still my first choice for recording and mixing but will happily mix in X too when X projects come in.