To the pricing issue:
At least over here in Germany, nobody (as in no major gaming site/magazine) has heard of ai wars, i stumbled on it via Steam. I now recognize the full extent of your genius, but i probably wouldn't have spent more than 20€ on the game out of a (apparently) misplaced mistrust in games i have not heard of (i.e. from developers who didn't spent a couple of millions on advertising :-) ).
So your pricing policy basically hooked me and i will most definitely buy the expansion as well, no matter how you'll price it (well in the range under discussion), but in the interest of hooking more players you might want to keep the pricing.
Finally, i love the game! I have yet to explore the real hard levels, but this will come... Thank you for this great game!