sonusman, a lot of people would not agree with the amount of compression you recommend (3db at 2:1 or less ratio).
Ever heard of a guy by the name of Tom Lord-Alge? You should, he's one (and his brother, chris) of the most demanded rock (and pop) mixing engineer. He's done Weezer, Blink182, Sara McLaughlin, and countless others.
Anyway my point is this: Tom makes good use of his compressors and often puts as much as 20 db of compression on the vocals. Now obviously we're talking about Class A gear here, but the home enthusiast can get the same effect by using <14 db of compression at a low ratio on say,
the dbx 160A because Class A gear is very transparent even at those high decibals. He puts this much compression on the vox not because the dynamics are out of control, but because of the sound it creates. The point is, 3db of compression is extremely soft, even for shitty alesis compressors and would not make that much of a difference especially with a dynamic source.
And about squashing mixes in mastering: there's only a handful of people that can do extreme squashing (making the cd loud) and keep it sounding good and transparent. I have to say that Bob Ludwig is not very good at squashing mixes--actually I dislike most of his mastering because there seems to be a high end roll-off.
"take off your pants and jacket" by Blink 182: although fairly retarded music, you have to be amazed by the mixing and mastering. This is a fine example where tom lord-alge uses 20db of compression on vox and the mastering is finely done--squashed to hell, but still retains it's sonic value.