a boss OD-20 through a clean channel of a line 6 spider II, or any other amp with a good clean channel (FENDERS!!!) I use the MT-2 setting mostly when playing metal, but I've also used the DS-1, the "stack", the "metal", and the "rectofier" settings to great effect.

I haven't used any of the amps you've listed, but Roland is like the same company as Boss, and the cube amp uses COSM like my OD-20, so it probably sounds similar, so I'd say go with that!