Behringer analog synth note stabilities?

K-2 has a lot of pitch instability in its lower bass notes. This is obvious when you try to tune the oscillators and there's constantly about +-5 cents of movement in the frequency of the oscillator.

This is a bit sad as it makes K-2 unsuitable for the lowest bass note playing if you want to achieve a "stable" sound for your bass sound. The observed effect was so obvious that I ended up replacing one of the bass sounds in my song with my digital Roland XV-3080 ROMpler.

So my question is: How do other Behringer analogs compare to K-2 in their oscillator stability playing low bass notes? Which synths are really stable? Which ones have that same kind of note pitch instability?