When you think “bow rider,” you probably picture a young, vibrant family – Dad at the helm, Mom alongside, two PFD-clad kids sitting aft – enjoying an active day in the sun and spray. And why not? For decades, that’s how companies building these boats positioned them in the marketplace. But why should kids have all the fun? Mariah’s R19.9 is great for anyone who loves being on the water, but doesn’t fancy a trip to the poorhouse. You can set yourself up in one for about what you’d spend on a decent car; an R19.9 costs under $30,000, nicely equipped. (O.K., not much under $30K, but you get our point.) We have never looked a Mariah before.