I voted for the "Flash Gordon" sword and planet style retro-futurism (or zeerust), but I also ADORE DragonStar and it's mix of modern computers and current science-fiction elements mixed in with D&D. I truly love the inclusion of space travel in D&D games, and space travel done in a fairly realistic, science fiction manner. Realistic physics and realspace, not the fantasy space of SpellJammer.
I love the idea of battle fleets composed of starships and starfighters, with escorts of wizards and sorcerers swarming around them for magical point-defense, using nothing but eldritch forces to propel them through and protect them from the Void. Of great space battles where capital starships fire wave motion cannons at each other, starfighters duking it out in fairly realistic microgravity combat (no Star Wars style dogfights in space.)
...and also of wizards flying through space, either riding creatures like Byakhee or using spells to move under their own power, protected by deflector shield spells and engaging starfighters in one-on-one battles, throwing magical plasma beams from wands and hurling magical anti-matter grenades, and using spells to transmute the 'fighters into glass; and entire massive capital starships being struck down by spells of epic magnitude and the awesome magical power of lone Archmages.
I want it ALL, baby.
So, even though I voted 2, I really like both 1 and 2. But if I had to choose between those two, I would go for a more pulpy Flash Gordon mixed with Jon Carter aesthetic.