Get the Aisin kit on Amazon that includes all new pulleys, water pump and hydraulic tensioner. Watch Timmy's Videos to decide if you are comfortable doing the job. One tip I have is to make sure the foam seal on the plastic upper cover is good. If not, moisture will build up in there and on foggy mornings and cause horrible squealing, it's even worse when it's actually raining hard! Ask me how I know!
While you are there, it's a good idea to do the Valve cover gaskets/Intake Gaskets, Clean the throttle body, replace all the vacuum hoses you can touch, and do a solid inspection on the rest of them. You Valve covers are likley seeping already, use an inspection mirror to check between the firewall and block, this is where my leak started, now it's all the way around. I wish I had just paid my guy to do the VC gaskets 4 years ago when I did the new Timing Belt Kit.