Nero Burning ROM is probably the best all-in-one CDR/DVDR application on the market.

Nero combines huge amounts of features in a compact and easy to use package. It handles disc dublicating and pre-mastering with ease, supported by a cover designer and even an audio file editor. The excellent GUI desing keeps all the functions handy and guarantees that simple tasks can be done quickly.

If I'd have to settle with just one CDR / DVDR burning software, then Nero would be it.