I have a couple of green chromis and I agree with reef raf on this one. Survival rate with chromis is sometimes low especially with chromis in groups. Some will school and one or two will be kicked out of the school and be harassed by the group. I have had this happen a couple of times with a group of six or more. Adding them now would give them a chance to get use to the types of food you feed, also a chance to quarantine them in case of illness form shipping. By the time your new set up is up and going you will be able to enjoy your fish in your show tank and not your quarantine
