well,that was my opinion in mogul blbs.May i aske why you want to go with HQI/DE bulbs?
FYI,mogul based bulbs often have higher PAR than DE/HQI's when driven off of an M80 ballast.
The reflectors for moguls are alot more adaptable/much cheaper than the DE fixture/reflectors.With spider parabolics for moguls,they allow you to customize the light dispersion to fir your particular tank.DE reflector/fixtures have a very narrow spread.I prefer moguls over HQI's because of this,you can also retro a mogul MH system for about 60% cheaper thana DE setup.