1994 Subaru Legacy Water pump and beyond

I have a 94 legacy wagon with 86k miles on it. It started overheating, so I took it in, and the mechanic says it's the water pump. So, he says while they're in there replacing the pump, he suggests the following additional repairs be done: Timing belt (even though it was done about 25k miles ago) tension belt, cam seals, thermostat, and crank seals. He quoted $1000 to do all this work. I do know that the cam seals are leaking, so that a no brainer. But I'm just wondering if all the other things he suggests are necessary, and if $1000 is a good price. The alternative is to just do the water pump / timing belt for $650, which seams reasonable, but I'm not sure that the additional items should carry an additional $450 price tag. Any thoughts?