I'm guessing that swapping the timing belt while the engine is out of the car will reduce labour considerably. And it should be a straightforward job? I've never done a timing belt change on any engine here, let alone a foreign RB25det. But an engine is an engine and i think i will just get my mechanic to come over and do the job for me.
I'm thinking of using the Power Enterprise timing belt sold on phase2motortrend... http://www.store.yahoo.com/phase2motorspor...poenrbtibe.html
The Greddy timing belt is even cheaper, but the brief description hasn't sold me on it. http://www.store.yahoo.com/phase2motorspor...s/grrbtibe.html