Richard brings out some really good points about BI and where it came from and why you need it.
Check out his post for details ==> BI--What is it really? » Richard's Attic
Please vote for Ola Hallengren, in my opinion he has the best maintenance scripts, and best of all “THERE FREE!”.
You can check out his scripts and well as the link to vote from this page SQL Server Backup, Integrity Check, Index and Statistics Maintenance