This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Struts and JSF can be used together. No need to use one in place of the other. The UI part along with all the validation can be put in JSF while Struts can do the rest of the tasks in the struts life-cycle.