I have mine separate from the DT, in the basement fishroom. It's a 2x4x12" 60g Deepblue tank with a 100g rubbermaid stock tank with ~ #150 liverock as sump. I use a ASM G2 skimmer and have both a carbon reactor (24/7/365) and GFO reactor (as needed). There are a total of 6 chromis, 4 in the tank, 1 in the sump, and 1 in the skimmer box (DIY'd an acrylic box to keep the skimmer at 8") I use 2 x kessil A360w's for lighting.
It is currently stuffed full of frags trimmed from the DT. As soon as they encrust just a bit more they'll be posted for sale on my local forums.
hth