If the client *MUST* have it louder than thou, I've had fairly good results from the "Type IV" in the Quantum II - A dB or three works well on some stuff - Craps out on others (just like anything else, I suppose).
I like the UAD as a digital option... I tend to use the limiter in the STC-8 as a "last line" quite often, but that limiter is so freakin' fast... If anything *really* hits it hard, it'll swallow the whole mix. But if it's under control, I absolutely love it.
