Opus...welcome!
Listen, I sell Safe Sound Audio in certain areas of the world (North America and now Australia to be exact) so remember I'm biased. But I can answer your questions!
The expander is a simple one knob circuit, and if you know the difference between a typical gate and expander maybe you know this...but this expander doesn't "close" like a gate. It attenuates the signal a fair amount (20dB) but maintains a very natural response by using this method. Also some gates when they open too quickly can cause a "click" or distortion while opening.
The P1 does not suffer these side effects.
More info is available by reading the white paper, if you have a minute to read this stuff. The owner of Safe Sound Audio is a very thoughtful designer, in fact he's a former Neve employee located in the UK.
http://www.asuc33.dsl.pipex.com/whitepaper...aper.htm#expandHope this helps. When reviewers say it's easy to forget it's on while tracking, they're right. It can be very transparent.
The Speck is an excellent EQ and coupling it with the P1 is a great idea for a complete channel strip! I currently use some old dbx242 eq's in my setup for my 2 "go to" channels but yes, that transformer would add nice color as well. Vince is a great designer as well!
War