I decided to go with metal halide because after seeing that while t5s save energy they don't last as long and having to buy 4-6 new t5 bulbs every 6-10 months would not be worth the electric savings, plus the light looks less artificial with a Metal Halide and many hobbyists are switching from t5 to Metal Halide and the only ones getting rid of MH are getting LEDs, but even if I get 5 years life out of a 500$ LED retrofit it wouldn't transfer over very well to a bigger setup which I plan on in the next 1-5 years, and if I wait LEDs will be WAY cheaper by then anyway.
Originally I was set on the 150W cause I figured it was enough for the depth of the BC29... but while I was at my LFS I casually asked (not planning on investing 300 on a light for a few more months) and while they didn't have the 150W, they had 1 250W that they offered to sell for the price of the 150W... yeah, I can't pass up 100$ in savings, so I crumbled, and my wife didn't speak to me for a whole 20 minutes (it was great, lol)! Anyway it's a great light and it's nice that it has 2 moonlight LEDs on the arm, that are way brighter than the 3 stock moonlights in the hood. My corals are happy and my GBTA is too, which makes me happy.