I have an Alesis 3630 ($100), two Boss RCL-10 ($150 ea) and two Summit TLA-100's ($1,300 ea).
Somewhere, someone claimed the 3630 was an unabashed dbx copy. And the weird part is somewhere else (I think it was a Sound on Sound magazine), Rob Urry gave an interview and stated the project 1 dbx 266 was an answer to the cheap 3630 stealing sales away from dbx. Even more inbreeding pops up when you look inside my cheap
Audio Logic MT66. It looks like a dbx, the panel layout copies dbx, and sounds like other dbx units I have. Inside it also has quality controls stickers signed by whomever did certain stages of the build, and a DOD sticker. Now AKG bought dbx, and then Harmon bought AKG around the same time (early 1990's). Harmon is also DOD. Simple, right? So in my twisted mind, I have a budget dbx compressor. I have other dbx units, but this budget one works as well as any other, anlthough it just gets used on bass and drums.
I would also think of the 3630 as a cheap dbx knockoff, and I have been meaning to grab one off of eBay just to find out. They go for so little $$$ it would seem crazy not to have one, but then my question would be how many VCA compressors do I need? And the answer; one more

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The Boss RCL-10 seems kinda cheezy to me. I hate Boss noise gates to begin with, and the RCL-10 tends to hum and buzz with poorly filtered power supplies. I just don't like 1/3rd rack units that use a wall-wart. It just seems like a guitar pedal that wants to be a rack effect. All apollogies to the RNC.
Now the Distressor seems cool. At first just two knobs bugged me, but it looks so cool I wish I could own one. So you just have a few switches and no variables. Big deal. That would be my 'good' compressor for vocals, for certain. My sour graping for not getting one? They're single channel (yeah, yeah, for vocal you only need one channel), and they're $2K at Sweetwater. Don't even suggest
the DCL-200. It's solid state, and way over $3K.
Oh, read what second skin wrote ten times over and over. Only spend on a compressor (or mic, or pre, or.....) what you spend sound-proofing your room.