Cleaning solvent for parts washer?

[69hugger]

I am about to pull the trigger for a parts washer, and wonder about effectiveness of water based fluids versus stoddard solvent. I know Stoddard works, but is comparatively smelly, and flammable. This will be for relatively light use in my home garage, cleaning wheel bearings, flushing off engine parts, etc. I am thinking a Harbor Freight type washer, maybe a roughly $100 unit. Some washers say they are for aqueous solvents only, others are good for either type.
Does say, diluted Simple Green work in this application?
What are you using?
Any suggestions and experience with aqueous types would be especially appreciated.

Thanks!!
Bill