I poste at TOMB:
The slutz seem to prefer the WA, for what it’s worth.
I bought a 1176 Gyraf clone offa someone here – it’s awesome, tho’ ya gotta build one, at about the same cost as the Warm.
The Purple is quite a bit more $.
Not at all the same, but somewhat similar in being colored (tube make-up stage), is the VLA2. I like it sometimes, but find it noisy sometimes …
I also like the RNLA. I like it a lot on vox, and guitars, especially.
Simple compressor-color wise, a dbx 160 or 166 can be great, typically on bass and vox for me, altho’ the 166 can be excellent on stereo stuff like keys and acoustic guitar.
A DOD 866 is very similar, somehow related to the dbx 166, but a lot cheaper.
I really like Meek stuff, also, and the MC2 and C2 are tons of fun and I use ’em on everything.
You don’t ever hear about the Symetric 522, but now that I have one, you just did. I especially like it on electric guitar.
All of the above except the Gyraf are under US$300 used, some closer to US$200, and all capable of effective compression as well as some cool coloration.