Could get into Beyond the Gates of Antares. The sci-fi game Rick Priestly is working up with Warlord Games(a company made up of ex-GW peeps). It's early days and feels much like GW did in the 80's with the release of minis, anything goes atmosphere, and back and forth between punters and developers.
I guess the facebook page would be the entrance.
https://www.facebook.com/groups/694286423936769/
From what I understand you can sign up for a free copy of the rules as they stand.
Mantic are another ex-GW led firm. They feel a bit more like a 90's GW to me. They've battle size games, though the sci-fi skirmish game Deadzone and their sci-fi fantasy football game Dreadball have received louder praise from what I've heard. There's already half a dozen alien factions to pick from.
If Steampunk is more your thing could keep an eye out for Infamy Miniatiures. They're models are possibly the best in existence. A game recently went through a kickstarter, where you play just a few models either side with a level of detail and character you can't have in bigger battles. Could maybe srat with picking up some of the minis that really entice you.