The Portico 543 Compressor is the latest entry to the 500 series format from RND. I'm quite sure it will live up to my expectations. I plan to put it through its paces shortly and give a more in-depth review. In the meantime, here is some info on the the 543:
From the RND website:
"The Portico 543 Mono Compressor features a fully controllable compressor-limiter with feed-forward/feedback modes, Peak/RMS detection and a built in side chain high pass filter. With an unrivaled heritage and a tremendous feature set, the 543 yields a combination of rich warmth, flexibility and precision that is sure to resonate in the ears of sound engineers the world over."
"Built around Mr. Rupert Neve’s custom transformer designs, each 543 module has individually controllable threshold, attack, release, makeup gain, ratio, side chain HPF, Feed-Forward/Feed-back selection and Peak/RMS detection modes. With the compressor inactive, the 543 may be used as a transformer-coupled, high-performance line amplifier, and two 543 may be linked for stereo operation as well. The chassis is built to standard 500 series specifications, with power and I/O provided by the rack."
$995 at Sweetwater Sound