They are both good companies. I have shot many Bushmasters and liked them all. They are the number one provider of civilian AR's. on the other hand I really like the Sig. I have shot a buddies quite a bit. It seemed like a very good rifle. So much that I even though about picking one up at WalMart on Black Friday. You would be fine with either one. The key is to find the one that suits you the best.
" The strongest reason for the people to retain the right to
keep and bear arms is, as a last resort, to protect
themselves against tyranny in Government...." - Thomas Jefferson