I used Mustaavalkosta latest M-Series and it was stable. I had a problem with one App I used. Tasks by Team Tasks, where I had sync problems.
The Android 4.2 ROM started out pretty well in terms of stability. Newer builds have caused all sorts of problems. Basically, the problem is they are syncing a CM ROM made for another device, so the fixes are not designed for the DHD so it is a bit of luck whether a newer version will work better for out device.
That being said, PipelinerArd's March 15, 2013 release looks to be a good bet. Stability and lag fixed. If you have GPS issues with it, a Radio update may be needed.