Hello titanic9112001, SEPM 12.1 RU1 was released last year (21/11/2011) for the French version.
I've upgrade our SEPM from 11RU7MP1 to 12.1RU1 few time after and start deploying SEP on test client.
I've noticed a big RAM consumation and stop deployement for client that have less than 2Go of RAM. Client become unsusable if less than 2Go of RAM.
SEP 12.1 seem to been heavier than 11RU7. We're looking at Sophos product now.