I have saw it on mtbr ?
I would precise the year : it's a 1991
In the 1991 catalog, Cannondale has stop to write their name on the horizontal tube and prefer to put it on the diagonal and bigger. The "aluminum fork" we could see on the 1990 SM 2000 and on the yellow omega, became "pepperoni and was on the omega, SM2000, SM1000 and on the beast of the east SM800. In 1991, you could find the EST frame with the rear suspension. For the color, the SE 1000 and the SM1000 were both metallic grey, with suntour XC comp groupo, but the SM 1000 was in this beautifull color too, "blue pearl".
The 1990 SM 1000 was black and white with a ritchey steel fork, and was shimano DX equiped.
Your bike is quite original, but the shifter was "cannondale gripshift" the bar was an easton cannondale competition, and the flte saddle was a cannondale leather, near a turbo sella italia
But it's details
What a beautifull bike you have…
(you can see mine
and the catalog page )
Well… it's really not acceptable…