If you want to lean a bit more on the tanking side, you could try this build. I just made it up from guesswork, so it might be a spectacular failure in practice, but who knows?
http://www.wowhead.com/?talent=pZVx0VxZbEtohzd0xst
The basic idea is to make devastate spam viable dps. It is derived from the devastate changes on beta that never went live but would have made protection a top dps build.
The key talents are a combination of dual wield spec, one hand spec, cruelty, vitality and devastate. The first four talents passively increase your damage while dual wielding. Devastate is the rage dump.
As I said I cannot really tell how the dps will work out, but the build is absolutely main tank viable, even for the large raids. It also fits your available weapons and it is not so far away from what you use now. Might give that a try, if it sounds nice for you.
ps: There is some thread here called "Warrior BC Talent Specs" or similar.