In spite of OP's tone being unacceptable in a public forum, I still think we should not give that bad advice.  blockchain.info is a disaster waiting to happen - no, it is a disaster happening right now in slow motion.  The number of security issues is incredible.

OP:  Armory is a power-user application, but it is a nasty ressource hog.  The Bitcoin block chain has grown faster than their software has improved.  A very good compromise between convenience and security is Electrum, see electrum.com.  It securely stores your private keys on your computer (or even on an offline computer like Armory does), but uses online servers for the blockchain data.