Re: which expansion tank works da best?
I got Chris's Coolant tank, and it's a well made piece. I like it a lot. Just FYI, the silver looks more like a clear coat silver paint than aluminum finish. However, it still look very nice when installed. (lighting angle will make it look a look like bare aluminum.) Polished will look very good indeed, but Chris recomment me getting the silver as Polished gets dirty and dull easily and you might want to polish it to make it look good from time to time.
If you have a red manifold cover, the Red one will look good too, IMO.