130W of good lighting would be fine for a 55 gallon tank, in my opinion. I base this on two tanks of mine, a 10 gallon with 24W of power compact lighting which is really successful, and a 20 gallon with 30W of T8 lighting, in which I can grow a much narrow range of plants, and they don't grow very fast. The 10 gallon has 2.4W/gallon which is definitely not too much, and your proposed setup is 2.36W/gallon so if this stuff scales it won't be too much.
I would definitely replace the bulbs. The only power compact bulbs I can get my hands on over here are Interpet ones, and I like both the Triplus (tri-prosphor lamp with kind of pinkish tinge to the light) and the Daylight Plus (more balanced color, really brings out the greens of the plants). I would either go with 2 Triplus and 2 Daylight Plus, or else all daylight plus. The light color you get is too reddish in my opinion with only the Triplus, but some use that and like the effect. Your plants will grow either way.
I don't use CO2 in either tank. Too much hassle for me when my plants grow very well (in the 10 gallon tank) or OK (in the 20 gallon tank) already.
I keep debating upgrading the lighting my my 20 but haven't got around to it yet.
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