First time hot tub buyer. After a year of kicking tires and attending a disappointing Hot Tub Expo, we are working with a reputable local dealer. We decided that a basic round tub best fits our needs, budget and most importantly space. The dealer sells Viking and Bullfrog and both make a round spa. We're looking at the Viking 3, their best round tub and the Bullfrog 151r, their only round spa. Anyone with experience with these spas?