With the 12.2 you could run two of those together which even with the reduced wattage to 600 per cab the total 1200 Watts through twice as many speakers would be epic compared to a single cab being driven off the 900 head or even an equivalent 1200 watt amp.
What we really wanted was an 18.2 with two of the 900 watt power stages, 1800 Watts into two 4 ohm 8x10s, that would get the pub rocking!