depending on what corals you intend to have and then you can roughly gauge the kind of lighting you'll need... for example mushrooms requires low-medium light, lps medium-strong, sps strong....
i'll recommend you to get a T5 at least this will save you some $$$ rather then getting PLs and upgrading them in the near future... but of coz it'll be best to get a MH if you have a chiller
my 2cents