Get the Hunter Pro-C timer that is expandable to 15 zones. This is the best bang for the buck. It is a smaller footprint than the Hunter ICC. It is a great controller that will do everything that you need. Two timers is a problem because they could potentially operate at the same time and kill your water pressure, They will also look Mickey Mouse and show the world that you did on the cheap. The Hunter is an affordable option that will be a professional option.
Thanks
Dan