I tried out the Super Zero 2.0's for a month, and currently have a pair of Energy CB-5's...
I didn't compare them directly... but from what I remember of the SZ 2.0... I think it's better in terms of mids/highs... but especially midrange...
That said, the SZ2.0 has NO bass at all, and needs a high xover point (120-150Hz)... That's the reason I returned them.
The CB-5 easily bests the SZ 2.0 in bass... but it's not the very articulate in the low end... just that it extends deeper and has more output in the upper bass...
If you can place the SZ 2.0's close to the rear wall, have a sub that can work with a higher xover point, and are willing to pay more... I'd go with the SZ 2.0 for the better mids and highs.
But, you can get CB-5's for less than 1/2 the price (newegg has sold them for $75-80 shipped brand new)... and you won't need to set the xover so high.
BTW... If you do go with the SZ's.... make sure you get a sub capable of handling the high xover. Based on owning both Emotiva subs (Ultra-10 and Ultra-12), and seeing the Audioholics measurements of the Ultra-12...
I think the Ultra-10 is a good option... Even if you go with the CB-5 and use a 100Hz over... I'd still get the Ultra-10 over the BIC...
I admit, I've never owned a BIC sub... but I've read enough from people who've owned them that actually have experience with better subs... and the consensus is some of the BIC subs are good budget options for those wanting HT rumble... but won't give the articulate bass quality that picky listeners like myself want.