What you found on craigslist is the lowest model of dtx-plorer. The few problems I have with the kit is:
a) the cymbals are shaped retardedly, being used to real cymbals I just found it weird.
b) It sounds cheaper than the other yamaha you posted above, and the roland. Like I mentioned above, with electronic kits, you get what you pay for, when you pay the least amount you have to expect the least quality.
c) The hi hat pedal is not as responsive as id like it to be. Doing any kind of off-beat, open/close patterns can be a pain as the controller does not always work flawlessly. That was my biggest peeve with this kit.
That being said, if you want something to beat around and have fun on, this will get the job done and save you a bit of money. If you want something more real, the DTX IV - the one you mentioned above would be better. It feels, sounds, and plays considerably more realistic. Also, these kits have recently been discontinued so you may be able to pick them up for a great price if you can still find one.
Also, EBAY! eBay is a drummers best friend for all our ridiculously over priced gear, I'd highly recommend seeing what you can find used so you can have both quality and money in your pocket.