Halloween is coming and my kid wants me to be Darth Vader (for the first time!) He's going to be Anakin*. So I need some good quality costume for the occasion. Any suggestions from the folks here?

I heard Don Post has a pretty good mask/helmet and the Rubie's Costume Company made a few versions of the vest and cape.

Any ideas, suggestions, and web link would be appreciated.

* I was trying to explain to my 5 year old that Anakin would become Darth Vader; so it might not be correct to have both together in the same place (causing rifts in time/space continuum?) But he thinks that's cool!