For those that want the Roger Troutman sound.
If you aren't lazy and can do a bit of learning, you can achieve the Roger Troutman sound by what's called FM Synthesis. Before I tell you an easy stupid secret let's just consider this....
Getting a DX100 used is a nightmare and costs alot these days. So why wouldn't Yamaha jump on the re-issue band wagon and just make something like it. Well first off, to make a small keyboard for only a few sounds is obviously ridiculous. Second, the technology patent for FM synthesis is up and anyone can make it (Casio did, and look at Moot Booxle play). And last but not least, Almost every keyboard out there has a sound close to it if not better and also has the same if not close to it, FM synthesis technology in it. So you see, there's a software plug called FM8 by Native Instruments and can replicate the DX series by Yamaha EVEN BETTER because it's digital. Do some research on FM Synthesis and you'll quickly see that it's no secret to getting more bounce to the ounce.