The Argo isn’t particularly fast (top speed: about 25 mph), but it is unstoppable. With eight-wheel drive and a watertight hull, the Argo can drive right into a lake and, churning its octet of paddle tires, swim to the other side. It’s just the thing for upscale duck hunters or people with moats. There’s a stereo and a USB jack, so you can rock out and charge your phone while fording the Swan Pond, but beware that you’re limited to about 4 mph in the water. So if you drop into a current that’s flowing faster than that, you’d better have a plan for crawling out downstream. However, if you intend to heckle the scullers out on the Charles, you can also fit an outboard to the back to add some giddyup in aquatic mode. It’s like having your own duck boat, minus the chipper narration.