This is definitely an 'it depends' kind of question. Remember that your growroom is- if you want it to work, at least- an integrated system, with components chosen to match the overall strategy of your growing philosophy. blah blah blah, so on to the specifics;
If you want to aircool your hoods, then raptors, 6" xxxl or 8" xxxl 'ocho' are all very similar in design and performance. I would not choose a light reflector based on 'heavy duty construction.' That's for offroading! You want maximum light dispersion with an even lighting profile, and as few hotspots as possible.
If you plan to grow trees in your basement, then you may want to go with vertical bare bulbs, as many do here with great results.
The best reflector currently on the market by these parameters is generally recognized as the Adjust-a-Wing because of its simple open design, extreme reflectivity and efficient parabolic shape. Get the large one and for God's sake, don't buy or use the 'super spreader' accessory for anything but stirring your drink!
The above is all true, but you're not out of the woods yet when it comes to choosing a reflector. Fishwhistle is exactly right about needing adequate cooling to run
adjust-a-wings because they're an open style hood. If you need a sealed hood then keep in mind that no matter how you slice it, you're losing at least 8% of your light just by having a piece of glass in the way- and much more if it's even a little dirty or dusty. On the other hand, if you can't control your temps any other way than by aircooling your hood(s), then that's the way you gotta go. Your plants won't care if you have the super duper-est hood out there is their basic growing needs aren't being well met. This is what I mean by having a plan in mind to build your growroom as an integrated system.
I happen to be an advocate for moving the light around a circle above the canopy, but that creates some problems even while solving others. With a light rotator, you can put an open hood right down to within a foot of your tops and because it moves, it won't burn them. The problem is that unless you design the rest of the growspace to take this into account, you'll end up hurting your potential yields. If you want to know more about that, look up my thread in advanced techniques and problems, 'built my own light rotator, wanna see?'
