What effects processors can be used as hardwar plugins?

I am running Cubase SX 1 and am curious as to what hardware effects processors other than Lexicon products can used by Cubase and run as a so-called hardware plugin. Can someone provide me with a list of hardware effects processors such as the Lexicon MX200, Lexicon MX300 and MX400 and be used in this fashion by means of a USB connection and include an evaluation of their sound verse standard plugins of reverb/multi-effects?

Paramdaman (DT Hazelrig) (timescape_acoustics@knology.net)