Where to get a cheap-er water pump

[sasha055]

Hi,

I'll be replacing my engine mount soon and I read on Pedro's site that it's easy to replace waterpump while there.

My car is a 2000 Boxster base with 70k miles on it.. and I think water pump is due for replacement (it works.. just not sure how long it will hold)

I looked around and they are kinda expensive... (except deutsche parts.. wich is not an option)

I saw that rock auto sells refunrbished ones:

http://www.rockauto.com/catalog/raframecatalog.php?carcode=1441613&parttype=2208&a=FRc1441613k1027135-6545651

They have 2 types:
A1-Cordone and Uro ... both for around 100$

What do you guys think? any other places for 100$ waterpumps?

Also should I try to find a metal impeller one or stick with plastic?

Thanks
Sasha