"Leftism" kicks ass all right, I've been listening to my cherished vinyl copy lately (electronica vinyl + high end system = good).
Best of the 90's?
I'll go with Orbital "In Sides"
Boards of Canada "Music Has the Right..."
Global Communication "76:14"
the last two EBTG albums
...and anything by Plaid/Black Dog.
Runners-up: Spacetime Continuum "Sea Biscuit," William Orbit Torch Song and Hinterland LPs, "Snivelization" and everything else by Orbital.