I got two 1/2" Ocellaris from ORA and they paired up in less than a few weeks. Anyways, I strongly suggest NOT buying the 29g Oceanic Bio Cube.
Pros:
You have a tank
Cons:
Not enough light to keep an anemone
The bio-balls in the 2nd chamber are a nitrate factory
Very bad flow rate
AND when the clowns are pairing up and one chases the others, the one being chased always ends up in one of the filter chambers (normally #2 or #3)
Also, the Red Sea Max comes with a really nice, great protein skimmer! The fish don't jump in the back because there is a little lip on the back wall, you get 380GPH of water flow, the tank is bigger, and the filtration is WAY better! BTW, I have a pair of Black Ocellaris in my 34g and they absolutely love it! The like all the anemones in there, too!