Good Exchange Server Consultants

My company needs an exchange server solution for around 200 users. I’m IT support for our company but setting up exchange servers reliably and quickly is a little shall we say, out of my league.

I need some advice on a good Exchange consulting company. Someone who can come in and draw out a solution for us and who can later setup/install the servers and setup our employees accounts and just leave me and our IT staff with administrative privilages.

We are based out of Northern California, San Francisco, Monterey, Sacramento and San Jose. We would like to base the exchange servers out of San Francisco , so a consulting company from the area would probably suffice.

Any and all input and ideas are greatly appreciated.

Thanks guys!
-Peter D.