(to hijack just a moment longer...)
I don't see how normalizing would be much different than turning up the volume on your stereo in that case. Perhaps with analog tape, where the minimum noise level can be high (or the MK 1 machinedrum!), you need to be careful about introducing too much gain, but with a DAW there shouldn't be too much noise, right?
However, I can imagine if you're going to send your tracks off to be mastered that normalizing would reduce the engineer's options for compression and EQing. Don't they ask for at least -3 dB of headroom?
Anyway, I'm no expert, and Katz's mastering bible has been on my to-read list for a long time!