Vocal Compression
I found this site via E-BAY where I was looking for an Aphex compressor, and having read your question I thought I would respond .
I have been a studio engineer for over thirty years and always compress a vocal on the way to tape, (or now hard disc.) Firstly. I NEVER limit anything! As I am sure you know the final result is dictated by the weakest link in the chain so buy the best equipment you can afford. This does not mean you have to spend fortunes on vintage tube gear, there are some great "budget" mics around. Personally I use an AKG 414 and Two DBX 160 compressors. I set up the recording chain as follows: Set the level of the mic, with no compression on it, so that it is just peaking on the loudest parts of the vocal. Only when this is done insert the compressor into the chain. I set the ratio of my first DBX at about 2:1 and adjust the threshold until the unit is compressing 3 or 4 db. and then adjust the output so that the vocal is back to peaking on the loudest parts. I then send the output of this first DBX directly into the second DBX, the ratio of this one is set to about 5:1. Again set the threshold so that the unit is compressing about 4 db on the peaks and finally adjust the output gain to get the desired level to tape. That is the basic idea, you would have to experiment with your own gear to get the best results, but it has always worked for me.
Hope this helps
John Burns