How far have you gotten on endless mode?

I think I hit about 28 before I got bored and just played sloppy until I got wiped. I had found that the power creep with found weapons meant that Death Rays and Mega Plasma Cannons weren't as powerful as you'd think compared to other weapons. My strategy was to always have some missile weapons in addition to various guns and beam weapons so that the missile weapons in combination with my bomber fleet would absorb the worst of the enemy incoming fire while my gun and beam weapons did the real damage.