Redundancy setup exchange 2007?

Okay, i am thinking i need some redundancy or at least some sort of backup server for my exchange server 2007. Here is my setup:

1 Exchange 2007 server hosting about 150 mailboxes.

what i want to be able to do:
I want to be able to switch to a new exchange server if something happens to my existing exchange. It doesnt need to be right away without the users noticing it, but I want to be able to reroute the emails to a new server and make sure that all emails are there and the databases are working. Ideally, this server number 2 would be in another localization than my existing server. (in case of fire, etc. )

There are many different scenarios I have seen, but I would like to hear your opinion about what is best for me. I am running on an open value license agreement with exchange enterprise and windows server standard with software assurance.

What would be my best option?

500 Points for a good answer and thorough explenation.
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johnnybrianIT managerAsked:
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AmitTankCommented:
If you have Exchange 2007 SP1 installed, mailbox server is stand-alone (not clustered) & LCR is not enabled then SCR is a good option for your environment. Refer below article for further detailed information.

Planning for Standby Continuous Replication
http://technet.microsoft.com/en-us/library/cc164368(EXCHG.80).aspx

But this requires manual activation when your main server goes down.

If you want automatic failover then you have to go for CCR with Geocluster.

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johnnybrianIT managerAuthor Commented:
Ill give it a go within the next weeks! Thanks!
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