I have the Both the Blofeld KB and Mopho Desktop.
I would recommend the Blofeld for Ice cold pads and deep programing.
The Mod matrix is the key to making wild patches and I find the Blofeld excels more in the area of strange sounds than bread and butter stuff like synth bass. But if need be it can cover almost any territory. Adding an analog filter and or nice preamp can help some.

Blofeld Key bed is really nice.

The Mopho Desktop I got super cheap in a trade and have been blown away with what it is capable of. I recommend it for bass and the Arp and Sequencer are super handy as well. The Desktop is pretty brutal to program so get the other models. Also the filter input would be great for using on the Blofeld.

Hope that helps.