In alphabetical order:
Art TubeOpto 8 - http://artproaudio.com/art_products/sig ... ubeopto_8/
Behringer ADA8000 - http://www.behringer.com/en/Products/ADA8000.aspx
Focusrite OctoPre MkII Dynamic - http://www.focusrite.com/products/mic_p ... i_dynamic/
M-Audio Profire 2626 - http://www.m-audio.com/products/en_us/ProFire2626.html