The finish on the Mackie is similar to the ELX series, though maybe they do a better job of rounding the edges (that's where the ELX series sheds most). Moving up to the JBL/QSC you get duratex finishes which are different.
As far as the wattage .. simply marketing .. and it's probably a design taken from an existing amp, so it's probably just as cheap to make the amp symmetrical even though the HF will never see all that power (and QSC is not the only one to do that).
And I agree .. to each their own. Any of the subs mentioned are good enough for DJing, though if you get a chance to hear the Yorkville LS801s, they are almost in another class (for the money).
As far as the wattage .. simply marketing .. and it's probably a design taken from an existing amp, so it's probably just as cheap to make the amp symmetrical even though the HF will never see all that power (and QSC is not the only one to do that).
And I agree .. to each their own. Any of the subs mentioned are good enough for DJing, though if you get a chance to hear the Yorkville LS801s, they are almost in another class (for the money).