I think some theorists have it that you can't escape our expanding goldfish-bowl universe, even in theory. Imagining space beyond space is like imagining the time before time - meaningless.
But rather than your spacecraft hitting a brick wall at the edge of space, you'll simply find yourself at the opposite end of the universe heading in the way! I dunno!
DraiodoirX seems to sense some unfolding conscious purpose behind our universe. He's in good intellectual company, but with equally eloquent opponents (with more credibility in mainstream science) who see a background of blind indifference to it all, beautiful and magnificent though it is. I urge everyone to watch as many complete interviews on
http://meaningoflife.tv/ as they can, for a fascinating range of speakers on cosmic matters.