Toast from Roxio is about your only practical choice and is the de facto standard for burning CDs on a Mac. Fortunately it's also a good choice. Unfortunately, the cheapest I could find it was about $91 shipped (from
MacConnection). I use it on my Mac and it has been trouble-free. It also supports just about every CDR-RW drive on the planet, whether it was originally intended for use with a Mac or not.
Just a few weeks ago, after I got a SCSI CD burner, I did a lot of searching, and I could not find anything cheaper, no shareware, no demos, not even warez, only one other program called Discribe, which looked really lame compared to Toast. So I had to break down and buy a copy. Ahead is coming out with a Mac version of Nero sometime, supposedly, but the details on their website are vague, and there isn't now nor will there ever be a demo version of it.