Vintagedesign CL1. This unit have a really good reputation for its colour. I own Vintagedesign preamps and like their colour. Especially the M87D which is a mix of a 1081 and 1073 (kind of).
The Vintage Design CL1 MK2 is an amazing compressor. It is a real TOOL for dynamic range control, plain and simple. It can do many different tricks for many different applications. The gain reduction circuit can very very transparent; however it does add a very clear and brilliant tone that works well for EVERYTHING!! It is a personal favorite for tracking vocals, bass, GTR's, and of course the drum buss.
I just want to chime in and say that the Vintage Design CL1mkII is pure magic on vocals. Like you say it adds weight and a smooth kind of punch. It can make less than ideal vocals sound interesting and great vocals sound spectacular. Puts a smile on my face every time I use it. The CL1mkII sounds great on most instruments, but for vocals it's pure magic.