I'll tell you My reasoning for thinking that the Empeg is better designed by being an all-in-one unit that doens't require a box in the trunk:

I can take it anywhere I want with me, and I do - my music walks up to my house/work/parties with me. I think this is one of Empeg's biggest strenghts - the ability to take it with you.
-mark

...proud to have owned an Empeg since 00287