The Blofeld sounds great but it's built to a budget so you need to decide whether or not you can cope with the compromises that brings.
You know I always thought it was weird that the Blofeld had such a powerful engine but it was hindered by loads of menu diving, poor interface, four octave keyboard and other things. Plus the tiny writing on the body really annoying.
Some of the most expensive parts of any synth is in particular the interface... so the fewer knobs and buttons (and thus more menu diving) means that you get the synth a lot cheaper... and that is exactly what the Blofeld is... cheap... considering what it offers.
Waldorf has been using this matrix-style for many many years... it's not bad unless too many parameters are present... it's perfectly easy on say, a Pulse 1... the irritating thing on the Blofeld and Pulse 2 is those darn encoders... I wish they would stop using them... they always end up skipping values, behaving erratically... on top of that, the encoder caps should have had rubberized coating instead of these silvery and "slippery" ones.... in fact they should have been proper KNOBS instead with a fixed start and end if you ask me...
Besides... if you do not need keys, and a small module is possible, a small unit has gotten my attention lately... the MicroMonsta.... an 8 voice little "bug" that actually sound pretty well, and is pretty logically laid out... has lots of digital synthesis types in it... but maybe it's still a bit too niche... don't know... but it's dirt cheap.