i have a accuquilt go and i really like it sometimes. it is great for something like a double wedding ring or to cut out 200 perfect little triangles.
i still rotary cut smaller quantities (especially strips and squares) because by the time i am cutting the strips to size for the cutter, i might as well just cut them to the right size to use. i tend to use my june taylor shape cut ruler for strips because it is fast and easy.
the real cost of a die cutter is not the cutter but the dies. why not go on their sight and add up the cost of all of the dies to make 4 or 5 different quilts and then decide if it is worthwhile for you.