There is one compressor pedal I've found that will lay all these complaints to rest, and without spending $229 or even $259 Key Lee prices for a 4 knob super custom modded compressor. (nothing against Key Lee)
Try the CMATMODS Deluxe "Ross" Compressor.
http://www.cmatmods.com/deluxe-compressor.html
Has Sustain, Level, Tone and Attack knobs so you can have your sustain, you can have clean boost, you can moderate the tone, and you can do it without squashing the vital pick attack transients that make your guitar cut thru a mix and sound alive. Nothing against Key Lee, just that it's impossible for me to imagine any $259 dollar model being able to deliver anything more astounding than this CMATMODS Deluxe Comp.
I agree one should never compress a distorted sound, but I do take the compressed sound and over drive it a touch, gives me the punchiest clean rhythm sounds I've ever had without losing any attack transients, and the chords will still ring all day if I let them.
The Barber Tone Press is my other USDA Choice Compressor, but those are something like $159 new, and I got my Deluxe Ross clone new from CMATMODS hisself on the bay for about $145 shipped. Most underrated, underestimated, underhyped and BEST damn compressor pedal I've ever touched, bar none.
If, on the other hand, you want a slight challenge and you are on a strict budget, get the Monte Allums mod kit and install it on your CS3. Turns it into a nice enough keeper. But once you try the Tone Press or the CMATMODS you will not be able to sell your CS3 quick enough. Get
a 1-Spot so you can quit buying 9v batteries.
You can use a TS9 as a boost, but a stock one will alter tone a bit. The Allums mod is easy to install and makes it into a really nice pedal, but it does have its own color and tone, it is not transparent.
For a clean boost try
the BBE Boosta Grande, 20db boost without altering tone, power adapter included, under $100 bucks, no noise even at full boost, 5 yr warranty, made in USA.