I guess I'm spoiled with the G70. Add an SRX-07 Ultimate Keys board to it, and most of the 70's 80's and a lot of the 90's synth stuff is well covered.

I've even been called on to cover some Lady Gaga stuff live for a girl singer, and amazed myself at how well the G70 keeps up. Roland have always made synth sounds one of the best sections in their arranger Tone section. You can even set the sliders up to do VCF sweeps and LFO depth and speed things. Sure, it ain't a King Korg (which itself is no Prophet12!) but I'm always amazed at how close I can get!