I like my Micrkorg, but a lot of people do not agree.
It is a cheap synth, great for your money. And it has a great editor you can MIDI to your computer and use. Layer 2 sounds the same, tweak em up or detune a bit, it sounds really nice! Easy peazy!
Alesis micron's are nice too though, I think they pack more of a punch. Some people like them more, I personally would have picked up a Micron over a Microkorg, but I guess the MK has a better vocoder, and now I have a nice professional microphone and I use the vocoder for samples a lot!
If you're really looking to spend money, buy a Prophet 08, OH man, I am getting one as soon as I can! 8 Voice Analog Synth, this thing is a f*ck*ng monster and does it ever wail. 2 grand is the price tag. That's 250 bucks a voice, and well worth it.
Or you can get a nice vintage Synth like the one I have, the Poly-800!! I am horrible at programming it, when I have more room I will hook it up next to all my other gear!
Or go even cooler and get a Juno-6 or a Jupiter 8 or something! whoh, crazy old expensive awesome synths.
Have fun picking out your new SYNTH!!!!!!!!!!