crocutus

Time for a new timing belt in my 1997 legacy. Looking around rockauto.com I'm a bit overwhelmed by the number of kits on offer with seals and water pump. wtf with the integrated assembly? Is this a different setup, or just a convenience to save time? What is the total number of parts I should have on hand before starting to be sure of success. Belt, water pump, gasket, tensioner, three idlers seem to be in most. Crank seals and cam seals are less common. Is that just overkill, or something I'll likely have to get separately? Don't recognize most of the manufacturers. Hoping to avoid junk parts, obviously. Choice of ACDelco, Gates, Contitech, Dayco, Aisin and Continental but drawing a blank on their relative merits. Any assistance would be much appreciated. Thanks.