Oh 30" isn't much room to work with for a reflector. Still, the medium adjust-a-wing should fit. Dimensions are 22L" X 24W" adjustable to 27". I think it would cover your space nicely. The super spreader would help with the heat however you're going to need an exhaust fan no matter what you go with. See adjustawing.com and also look for the informational video on youtube.

I do use bloombastic. It's super hot. I give 1/5 the recommended dose at weeks 3, 4, and 5 in flower. It seems to be very effective. I got the free trial bottle and it's lasted forever. I'll probably buy more when it runs out in a year or two.

I did a lot of homework before sinking cash into LED panels. They are crazy expensive. I went with LEDs b/c I was concerned about heat plus I don't like the idea of an HPS burning in my basement. Turns out my fan can deal with just about anything so my heat concerns were overblown (ha ha ha). Mine has 3w diodes too which is pretty good. It has done very well although from what I can tell it takes about 1 - 2 weeks longer for flowers to ripen.