Definitely do the timing belt, water pump and tensioner all together. It can be a pain to get in there. Especially when the last person to do it (stealership) used king kong and a 20 ft breaker bar to torque the crankshaft pulley nut on (search my posts to find out why I say this).

Search the forum for helpful hints and tricks for changing all the stuff out. There has been quite alot written on it.
Good Luck <img src="/forums/images/graemlins/patriot.gif" alt="" />