should i upgrade?

[spikehs]

got a bit of a dilema.. after hearing venkiw prices for the electronic ballasts on the 250 and 400 I am seriously considering upgrading my light. But the thing is I don't really NEED it. I have a 55gal with a 175 tripple balast - plenty of light, but i figure when I upgrade my tank, if i have these lights its one less thing to worry about (and spend $$). I was just wondering do electronic balasts save that much more energy then the regular ones? I read somewhere that its quite a bit it energy savings.. would 2 400w bulbs be a bit of overkill? I figure so, but if i stagger the lighting then everything should be ok correct? I guess I am just in need for some convincing!