The Yamaha DD-65 looks like a cool small foot print solution. I've thought about something like that so I can tap out some beats while sitting at my desk, but my ekit is just 2 steps & a stool away. When lazy or in a hurry, I'll just tap something out on my keyboard if I need a quick beat...if I don't EZDrummers midi to get started.
As an option, a used older ekit on ebay can be found pretty cheap. An older $1,000 Yamaha DTXPress kit can be bought for less than $300 ...how cool is that?