I'm curious. There's a number of people in this thread suggesting that a non-OEM water pump that fails at 40-60K is a bad thing. I highly suspect the number of people here who have put that many miles on a single GVR4 is on the smaller side. I can't say I would consider that a negative point.
I've always used the off-brand bits from Parts Dinosaur for rebuilds - including water/oil pumps, timing belt tensioners and pullies - and have never had one fail in the Arizona heat. I *have* had OEM alternators fail within the the first week after install though. A few isolated failures are unfortunate, but it happens and it seems to me that you're seldom out the money spent on them. Besides, if you can get 60K out of a water pump that costs a quarter of the price of the OEM unit from the dealer, you can rather easily replace the water pump when you're doing the timing belt (if nothing else, for peace of mind) at the 60K service interval four times before you would stand to lose anything beyond those five minutes it takes to swap the pump during a tbelt job.
Not sayin', just sayin'.