I bought my C-12 back in 2007 and I’ve run it hard. I purchased it as a package but I don’t think the C-12 comes as a packaged set anymore. The two essential accessories are the FastFix Right Angle Chuck and the FastFix Eccentric Chuck. This is the lightest, most powerful, most versatile, durable drill on the planet! The Festool CXS Li-Ion 10.8V Cordless Drill Multi-Chuck Set is currently offered at a great value but doesn’t include an eccentric chuck.
Note- The C-12 has been discontinued and the C-18 is the newer version.