T5 or Halide is what I'd recommend.
VHO and PC are obsolete technolgies.
A 6 lamp T5 system with individual reflectors would be more than adequate. A 2 lamp, 175w halide system would also be great for anemones.
For a 55g tank, I'd recommend a bubble tip anemone and a maroon clown. A 55g tank is too small for most anemones, in fact a BTA is pushing it some, but it should work.
For a decent system, expect to pay no less than about $350.