Best methods for moving sql server database to new server for least amount of down time

Hi.  It's been a long time since i've had to move a sql server database and the sql server connections were always already set up for us by the Network techs.  This time, sql server will be installed on the new server (same version 2008 R2) but I will probably have to set up the connection and initial security etc.  I've been looking at the methods now available to do this and having a hard time figuring out the best one to use..   We will be keeping the old server/sql server running (being used) while we set everything up on the new.  In a few days when we know everything is working, we will want to bring the new up to date with the old, disconnect the old server and start everyone using the new.  So which would be the best method to use knowing that I need to do it again in a few days and keep the down time very low?
1.  Using the Move/Copy wizard..  This option looks as if I'll be able to copy the database to the new server as long as I have the initial security ... owner and sysadmin rights set etc.   It appears that I can also bring over the log ins etc.  
2.  Full Backup/Restore method..  It looks as if this will NOT bring over all the log ins, security etc.  True?  
3.  Detach/Attach method?

If I was able to use #1 and copy to the new server/instance etc., what would be the best way to bring the data up to current when we go live in a few days?  I guess it all depends too if I have any problems initially with anything but I'm just looking for anyone with experience to point me in the right direction.  Thanks!