I can’t see myself getting rid of either but if I had to replace one before the other it would be the Proteus 2k just because of the options and sounds I like and I think my buddy would agree. I do mostly R&B, hip hop, techno, and trance, he does mostly country, pop, classical and top 40. We (meaning my buddy and I) do a lot of different music. My keyboard controller is a 6.1 (but the 6.1 is going away, anyone want to buy it?!?!?) I personally would not give up either.
I personally own a QSR with the vintage keys, vintage synth, eurodance, and hip hop qcards, and I also own a Proteus 2K with the Pure Phatt and Techno Synth ROM and a Roland JV-1010. your friendly neighborhood TaxMan's opinion about the QSR. That thing is tops when it comes to reving up the leslie.
You get a set of keys PLUS four drawbars to customize your patches with EASE AND a MODULATION WHEEL. If you've got some extra cash though, I'd suggest going with the QS6.1. The Rhodes and Wurly tones are top notch. With some tweaking, though they can sound quite nice (especially the Dark Classical patch). Pianos are passable, but I'm sure there's better out there. There are some useless dance loops on there and some freaky little bells and whistles, but which module doesn't have that. KILLER KILLER KILLER! Put some rotary emulation on there and you've got yourself a damned fine solo or wash instrument. I like the QSR simply because of the quality of the patches.
