If he is doing "mainly softies" ... a 48"
ATI would be the biggest waste of money ... there is definitely no need for one ... Like people have said the Nova Extreme pro and the Tek are the best bang for the buck!
How long do you run your current halides for? If your electric bill is really that high ... you should honestly compile a list of all of your equipment, the wattage etc. etc. and use the reef calcul
ators over on Reef Central (i will find the link for you) and determine what you can do to cut your costs ... Sometimes your return or skimmer pumps cost more to run then your lights, remember they both run 24/7.