The Top 10 Plumbing Fixes: Save money by doing simple plumbing repairs yourself. These fixes are completely DIY with basic tools and skills. http://www.familyhandyman.com/plumbing/the-top-10-plumbing-fixes
Both PEX and copper are good options; however, both have some advantages and disadvantages as well. PEX is less expensive, and fast to install, while copper is more expensive and can burst in cold weather.