Yamaha DTXpress/DTXplorer/DTXtreme

I am a middle aged guy who has taken a few drum lessons which i 
enjoyed. I need to buy some equipement if i am going to stay 
motivated to explore this new interest further. A regular drum set is 
too loud for my family. I have been looking into a DTXpress kit 
through ebay, and other dealers. As a new comer to drumming should i 
take the plunge with a kit like this or should i be starting with 
something simpler, easier? Also, if this is the way to go, how much 
should i expect to pay for an electonic drum kit?
Any suggestions would be appreciated.
Thanks,
Ryan