I've used Imation [and several other brands] and can reccomend them. I've only made one coaster, and I was downloadin sheeet when I was burnin. Silly me. Oh, I've had my burner for just over a year now
I use TDK Certified Plus and Verbatim Data Life Plus and haven't had a problem with any CD players not being able to read them. Between me and my brother, we've probably burned around 100 audio cds, using those.
I did come across a problem with the Imations though. My friends car CD player wouldn't play one without skipping.