last month I was able to get X2a running very well on my machine. Still a few bugs but I can live with / work around them for now. I have an off the shelf HP machine i ordered from HP, yes I had them add a hard drive and upgrade the RAM and Video card, but nothing exotic or expensive. Update your windows, optimize the machine, install the X2a patch, make sure you have the latest device drivers. I had tons of issues, crashes etc before i did these things, now, I rarely have an issue, and if I do experience an issue, its a bug. A reboot and I am good to go for another many sessions before i have an issue again. The most common bugs I see are:
1) my interface drives sometimes get "lost" after I change the buffer size. Doesn't happen every time, just sometimes.
2) sometimes sonar does not "unload" completely before I shut the machine off, when this happens, the next time I boot, the drivers get hosed, need to reboot and all is good
3) if I have multiple takes and I freeze that channel while a few of the takes are muted, upon thawing that channel, they are no longer muted. very annoying, so I right click and mute on the clips, rather than the take lane.
4) pre -X2 projects with soft synths seem to be a bit tempermantal. So I copy the midi data to another track, remove and reload the soft synth, move the midi data back and I'm good to go again.
5) IMO, i don't like the take lanes as they are. takes up too much screen real estate, limited vertical zoom, sometimes if a take lane in the middle is deleted, the screen doesn't refresh, its def gone, but there is a big gap where it was, the other lanes don't collapse back together. I hope they improve them, if they can't, I would thrilled if they went away.
Wish list: I wish I could create my own custom toolbar / control bar, not code anthing, just have a toolbar that I can select what tools I want on it so I could add a SAVE button!!! I know there is a keyboard shortcut and autosave, but I would really like a button!!