When I am at home I use an Isabey 6 inch wash brush and a 1 inch flat brush for most of my work. That particular wash brush is pricey (Cheap Joe's has them for the cheapest I have ever found) but they hold a lot of water and pigment which lets you get nice flat washes, blooms, etc and so forth. I feel like I have more control with the water and the pigment with that brush. I use smaller regular brushes when I am on the go and carry either a bottle of water or a thermos of water with me because I want my sketchbooks to dry faster (mainly because I am usually just doing thumbnails for larger paintings when I get home).
I've used a water brush before, but didn't really care for it. I much prefer regular brushes, especially when I was first learning how to paint. I've been doing watercolors for about 11 years now and I never did really get to where I liked water brushes, but I have a friend who swears by them, so I really think it is more of a personal preference based on your painting style than that the brushes suck.