you are going to find that everyone has their own opinions on this board, and many are quick to say, "you are doing it wrong because you searched for advice from your LFS and not this board!!" and yes, for the most part, i would agree with them, but, of the people I met at the LFS, some know the "current" information out there, and some still believe that the old way of doing things are still the best way to do things...... I prefer the new body of knowledge out there...
At my LFS, there are a few people that i think couldn’t keep damsels, and others that have the most amazing coral tanks. I have done my homework on here and on books i have read, and sometimes i ask questions i know answers to, just to see their response and then can base whether they are giving me good advice or not.
As far as your system, yes, the lighting you have will be able to "keep" most of the soft corals you have... but getting better lighting will help them grow quicker and get more color... JMO...
For feeding, I hear "DT's Phytoplankton" works well..
good luck with everything..