I'd say MH. When that light comes on, it's BAM instant beauty. The shimmer, the intensity, the growth, all hard to beat.

I hate this argument that T5 bulbs are cheaper. It's complete nonsense. The few T5 tanks I've seen would run about 5x T5's to 2x 150-250 MH. Let's do the real math, 5x $30 is $150. 2x $60-70 is $120 to $150ish, the same price. Now if you skimped and bought a 2 bulb system where you need a 5 bulb system you'd save money but have an ugly tank.