Alright, this is what I suggest:
Arc Custom Industrial Design: This lets us make good on our promises to the Board without the risks of truly mass-producable reactors, like the one in our chest. The next time we get a long-term research opportunity like this one, we can work on batteries for electric cars and such.
Repulsor Mk1: With these, we not only have flight for our suit, but we also have the possibility of revolutionizing space flight. And weapons-- we should aim to carry a repulsor pistol with us everywhere, or mount one to our chest reactor.
Exoskeleton Mk1: For obvious reasons.
Main Computer Upgrade: Makes Jarvis that much more capable, which will assist us overall. Plus, if SHIELD wants our help, we can offer Jarvis' assistance. We really need to pursue AI; Tony should not be putting himself in danger directly, he should be working with drones that do the really dangerous shit for him while he sits on the back lines and offers fire support and direction.
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As for the other shit...
-We don't have time for the 2-slot stuff. Too much low hanging fruit.
-Improved Repulsors are nice, but the Mk1 gives us the flight we need, and we should only sell Mk1s to NASA. Mk2s are too much for them, and we don't really need the extra firepower right now. When we have time, beam & rapid-fire will be nice, but focusing on firepower will hurt us in other areas. Best to get a wide suit of abilities, which we can then upgrade as needed.
-Improved armor is nice, but realistically, what we need is the suitcase-suit first and foremost. Next time we do R&D we can come up with that. We should not be charging for the front lines otherwise, though-- that's for our AI.
-I'd like to go after AI UI and Neural Modeling, we just have priority protection needs at this time. Arc Reactors are all we need as salable good; AI UI can be next after we have reactors to sell. And real AI can wait until we have better main computers.
-Holos are nice, but again, we don't need another product to sell right this second. Establish Arc reactors, then go after other markets. Even Stark Industries has only so much cash and marketing power, so one concept at a time.