well... if you already have the 1M, is it capable of producing thick analogue tones out of curiosity? it sounded really digital in the demos i watched. it would at least be a great module to learn on as i forgot just how many features it has. if you already have it... then keep it. it has stuff you can use, like effects, slider envelope generators are the best as far as i'm concerned, and there might be times when you want brighter tones too. besides, it also gives you MIDI too. as toy as it was, i wish i still had my casio SK-1 "sampler". it just had a funky bitcrush tone you can't get out out of 16bit+ pro gear. i lost it after all of the keys started falling out.
one benefit of having a normaled synth voice is that you can work a lot faster on it. one big rack owner was loving his atlantis because he could get stuff done on it faster. there's nothing worse than regretting getting rid of something because what you replaced it with can't do what it could. bright digital tones abound in techno and dubstep.