I have a Radias that I bought to replace my MS2000B. It isn't a workstation , if you want a workstation look at either a fantom , triton or a motif. Its a VA synth and as such makes VA synth type sounds . You wont find it able to reproduce many real instruments sounds.
If you want a VA synth then its great as long as you have the time and patience to learn how to program it , i found it fairly hard going and i consider myself pretty knowledgable in programming my own patches using subtractive synthesis. The factory patches are not really usuable in their current form for production, they require alot of tweaking , it's not a synth for a beginner. The factory patches are neat to listen to because they demonstrate what its capable of. This gets old fast though!
I'd say it's marketed towards the trance , house population , it is great for this genre which suites me just fine